Optometrist: A health care professional who is licensed to provide primary eye care services:
* to examine and diagnose eye diseases such as glaucoma , cataracts , and retinal diseases and, in certain states in the U.S., to treat them;
* to diagnose related systemic (bodywide) conditions such as hypertension and diabetes that may affect the eyes;
* to examine, diagnose and treat visual conditions such as nearsightedness , farsightedness , astigmatism and presbyopia ; and
* to prescribe glasses, contact lenses, low vision rehabilitation and medications as well as perform minor surgical procedures such as the removal of foreign bodies.
* Find a local Doctor in your town
Retinoschisis Condition in which the retina splits into layers, sometimes causing blurred vision. It is either inherited or acquired; the acquired form is caused by small cysts in the eye. You may also have floaters.(14 July 2009 - Online article Dr. William Boothe Dallas )
Retinol: Retinol is vitamin A. Carotene compounds (found, for example, in egg yolk, butter and cream) are gradually converted by the body to vitamin A (retinol). A form of vitamin A called retinal is responsible for transmitting light sensation in the retina of the eye. Deficiency of vitamin A leads to night blindness.
Dermatochalasis Excessive, drooping eyelid skin caused by a loss of elasticity in aging skin.
Diopter Unit of measure for the refractive (light-bending) power of a lens; eye care practitioners use it in eyeglass and contact lens prescriptions. A negative number refers to nearsightedness; a positive number, farsightedness. For example, someone with -8.00 diopter lenses is very nearsighted, while someone with +0.75 diopter lenses is only slightly farsighted.
Complication: In medicine, an additional problem that arises following a procedure, treatment or illness and is secondary to it. A complication complicates the situation.Dr. William Boothe
Cornea The clear part of the eye covering the iris and pupil; it lets light into the eye, permitting sight.
Esotropia When one or both eyes point inward, so the eyes are "crossed." This is one type of strabismus. (29 July 2007 Boothe Eye Care )
Boothe Laser Center article
Presbyope Person who has difficulty reading print and seeing near objects.
PMMA (polymethyl methacrylate) Old-fashioned hard contacts were made of PMMA, which is not permeable; today's rigid lenses contain other polymers that allow oxygen to reach your eye.( 02 February 2010 Press article Dr. Boothe Lasik )
Showing posts with label Boothe Laser Center. Show all posts
Showing posts with label Boothe Laser Center. Show all posts
Saturday, November 20, 2010
Tuesday, November 9, 2010
Dr. William Boothe Eye Care Video
Daily wear These soft contact lenses are worn every day for six months up to a couple of years. They require daily cleaning and disinfecting, as well as a periodic enzymatic soak (usually once a week).
Lateral rectus muscle Muscle that moves the eye away from the nose.(22 July 2007 - Online press article Dr. William Boothe Lasik )
Coloboma Cleft, usually due to incomplete embryologic development in utero. An iris coloboma is the most common eye coloboma; the pupil will often look like a keyhole or upside-down pear. Colobomas can also affect other eye structures, such as the eyelid, retina and optic nerve; only iris and eyelid colobomas are visible with the naked eye. Additional symptoms such as poor vision may occur, but are not readily apparent from a parent's perspective.
Sodium: The major positive ion (cation) in fluid outside of cells. The chemical notation for sodium is Na+. When combined with chloride, the resulting substance is table salt.
Vascular problem Problems with your body's vascular system (i.e., blood vessels, arteries and so on) can include hardening of the arteries, high blood pressure, a clot, an aneurysm, an embolus, etc. These problems can sometimes affect the eyes, resulting in such symptoms as blurred vision, a bulging eye, double vision, eye pain or discomfort, a red or pink eye, eyelid swelling and vision loss.
Vergence disorder Vergence refers to the eyes' ability to turn either inward (convergence) or outward (divergence); convergence insufficiency is the most common vergence disorder. The disorders' exact causes are unknown. Symptoms include double vision, eyestrain, fatigue, headache, squinting and difficulty concentrating (particularly while reading).Dr. Boothe Laser Center
High-index Type of lens with a higher index of refraction, meaning that light travels faster through the lens to reach the eye than with traditional glass or plastic. It is denser, so the same amount of visual correction occurs with less material (whether glass or plastic) — so the lens can be thinner.
Decentered ablation Also called decentration. Refractive surgery complication in which the laser is not centered on the pupil when it removes tissue. Symptoms include glare, double vision and halos. (24 July 2010 Boothe Eye Care )
Boothe Eye Center article
Intraocular pressure (IOP) Eye pressure, as determined by the amount of aqueous humor filling it. High IOP (ocular hypertension) can be a sign of glaucoma.
Chemosis Conjunctival swelling that is often caused by an allergy.( 27 May 2007 Online press Dr. William Boothe )
Lateral rectus muscle Muscle that moves the eye away from the nose.(22 July 2007 - Online press article Dr. William Boothe Lasik )
Coloboma Cleft, usually due to incomplete embryologic development in utero. An iris coloboma is the most common eye coloboma; the pupil will often look like a keyhole or upside-down pear. Colobomas can also affect other eye structures, such as the eyelid, retina and optic nerve; only iris and eyelid colobomas are visible with the naked eye. Additional symptoms such as poor vision may occur, but are not readily apparent from a parent's perspective.
Sodium: The major positive ion (cation) in fluid outside of cells. The chemical notation for sodium is Na+. When combined with chloride, the resulting substance is table salt.
Vascular problem Problems with your body's vascular system (i.e., blood vessels, arteries and so on) can include hardening of the arteries, high blood pressure, a clot, an aneurysm, an embolus, etc. These problems can sometimes affect the eyes, resulting in such symptoms as blurred vision, a bulging eye, double vision, eye pain or discomfort, a red or pink eye, eyelid swelling and vision loss.
Vergence disorder Vergence refers to the eyes' ability to turn either inward (convergence) or outward (divergence); convergence insufficiency is the most common vergence disorder. The disorders' exact causes are unknown. Symptoms include double vision, eyestrain, fatigue, headache, squinting and difficulty concentrating (particularly while reading).Dr. Boothe Laser Center
High-index Type of lens with a higher index of refraction, meaning that light travels faster through the lens to reach the eye than with traditional glass or plastic. It is denser, so the same amount of visual correction occurs with less material (whether glass or plastic) — so the lens can be thinner.
Decentered ablation Also called decentration. Refractive surgery complication in which the laser is not centered on the pupil when it removes tissue. Symptoms include glare, double vision and halos. (24 July 2010 Boothe Eye Care )
Boothe Eye Center article
Intraocular pressure (IOP) Eye pressure, as determined by the amount of aqueous humor filling it. High IOP (ocular hypertension) can be a sign of glaucoma.
Chemosis Conjunctival swelling that is often caused by an allergy.( 27 May 2007 Online press Dr. William Boothe )
Tuesday, November 2, 2010
Dr. William Boothe Eye Care Blog
Extended wear Currently, these contact lenses are FDA-approved to be worn without removal for up to seven days (or 30 days in the case of one brand), meaning some people will be comfortable sleeping with them in their eyes. Thirty-day contact lenses are sometimes referred to as "continuous wear."
Nose pad One of a pair of pads, usually clear, that rest on either side of your nose and help to support your glasses.(27 May 2008 - Online article Dr. Boothe )
Meridian One of a number of radially arranged imaginary lines, each of which passes through the center of the pupil when viewing the eye head-on. Generally separated in one-degree increments, meridians are used to determine the location of the most- and least-curved sections of the cornea when prescribing lenses with cylinder power to correct astigmatism. Meridians are also used to describe the shape of corrective lenses.
Keratectomy Surgical removal of part of the cornea.
Monofocal Type of spectacle lens, intraocular lens (IOL) or contact lens design that has only one area through which the eye focuses. A multifocal lens has more than one focal area, enabling sight at multiple distances, typically for people with presbyopia.
Monovision Vision correction method for those with presbyopia in which one eye is corrected for near vision and the other for far, either through contact lenses or refractive surgery. Monovision eliminates the need for reading glasses, but does have some drawbacks, including decreased depth perception. Read our article about monovision with contact lenses.Dr. William Boothe Lasik
Vitreous detachment Separation of the vitreous from the retina, caused by age-related vitreous shrinkage. Floaters are the typical symptom, but some people experience flashes of light as the vitreous tugs or causes traction on the retina prior to complete separation. Read our spots and floaters article.
Monochromatic Refers to one wavelength of light, as opposed to the many wavelengths of light found in varying colors. (05 March 2008 Dr. William Boothe )
Enzymatic cleaner A cleaner that removes protein deposits and other debris from contact lenses. It's recommended for use either daily, weekly, or monthly. Some enzymatic cleaners are a small tablet dropped into a solution along with the lens; others come in liquid form.
Neuroretinitis Inflammation of the optic nerve and retina, commonly caused by an infection. Symptoms include blurred vision, headache, floaters, eye pain or discomfort, vision loss and loss of color vision.( 18 June 2010 Online blog Boothe Eye Center )
Similar news you may find intriguing:
Boothe Eye Care, Dr. William Boothe, Dr. William Boothe Dallas
Nose pad One of a pair of pads, usually clear, that rest on either side of your nose and help to support your glasses.(27 May 2008 - Online article Dr. Boothe )
Meridian One of a number of radially arranged imaginary lines, each of which passes through the center of the pupil when viewing the eye head-on. Generally separated in one-degree increments, meridians are used to determine the location of the most- and least-curved sections of the cornea when prescribing lenses with cylinder power to correct astigmatism. Meridians are also used to describe the shape of corrective lenses.
Keratectomy Surgical removal of part of the cornea.
Monofocal Type of spectacle lens, intraocular lens (IOL) or contact lens design that has only one area through which the eye focuses. A multifocal lens has more than one focal area, enabling sight at multiple distances, typically for people with presbyopia.
Monovision Vision correction method for those with presbyopia in which one eye is corrected for near vision and the other for far, either through contact lenses or refractive surgery. Monovision eliminates the need for reading glasses, but does have some drawbacks, including decreased depth perception. Read our article about monovision with contact lenses.Dr. William Boothe Lasik
Vitreous detachment Separation of the vitreous from the retina, caused by age-related vitreous shrinkage. Floaters are the typical symptom, but some people experience flashes of light as the vitreous tugs or causes traction on the retina prior to complete separation. Read our spots and floaters article.
Monochromatic Refers to one wavelength of light, as opposed to the many wavelengths of light found in varying colors. (05 March 2008 Dr. William Boothe )
Dr. William Boothe Dallas article
Enzymatic cleaner A cleaner that removes protein deposits and other debris from contact lenses. It's recommended for use either daily, weekly, or monthly. Some enzymatic cleaners are a small tablet dropped into a solution along with the lens; others come in liquid form.
Neuroretinitis Inflammation of the optic nerve and retina, commonly caused by an infection. Symptoms include blurred vision, headache, floaters, eye pain or discomfort, vision loss and loss of color vision.( 18 June 2010 Online blog Boothe Eye Center )
Similar news you may find intriguing:
Boothe Eye Care, Dr. William Boothe, Dr. William Boothe Dallas
Tuesday, September 7, 2010
Dr. William Boothe Article
Keratoconjunctivitis Inflammation of the cornea and conjunctiva.
Hemifacial spasm Involuntary muscles twitches on one side of the face, typically caused by compression of the seventh (facial) cranial nerve by a neighboring blood vessel somewhere in the brain.(26 March 2007 - Online press Dr. William Boothe Lasik )
Cystoid macular edema (CME) Swelling of the eye's macula, caused by an excessive amount of fluid.
Monofocal Type of spectacle lens, intraocular lens (IOL) or contact lens design that has only one area through which the eye focuses. A multifocal lens has more than one focal area, enabling sight at multiple distances, typically for people with presbyopia.
Bioptic telescopic lenses (BTL) Devices attached to glasses that provide extreme magnification, typically used for driving. For people with low vision who are qualified, telescopic lenses are attached above the driver's line of sight to help magnify objects such as road signs.
Presbyope Person who has difficulty reading print and seeing near objects.Boothe Eye Care
Druse Small yellow or white deposit in the eye. Drusen are sometimes signs of macular degeneration.
Myopia Also called nearsightedness. Condition in which the length of the eye is too long, causing light rays to focus in front of the retina rather than on it, resulting in blurred distance vision. Additional symptoms include eyestrain, poor night vision and squinting. (25 September 2007 Boothe Laser Center )
Patau syndrome Also called Trisomy-13. Condition caused by an extra, third copy of chromosome 13. Symptoms include severe mental retardation, a small head, microphthalmia, a cleft lip or palate, heart defects and extra fingers or toes; many patients also have an iris coloboma and retinal dysplasia (abnormal development). The majority of infants with Patau syndrome die within the first year.
CK (Conductive Keratoplasty) Procedure in which a surgeon uses radio waves to heat collagen in the cornea's periphery to shrink it and reduce hyperopia (farsightedness). CK is also used to treat presbyopia. Read more about CK.( 19 February 2010 Online press article Boothe Eye Care )
Similar news you may find intriguing:
Boothe Laser Center, Dr. Boothe Lasik, Dr. William Boothe
Hemifacial spasm Involuntary muscles twitches on one side of the face, typically caused by compression of the seventh (facial) cranial nerve by a neighboring blood vessel somewhere in the brain.(26 March 2007 - Online press Dr. William Boothe Lasik )
Cystoid macular edema (CME) Swelling of the eye's macula, caused by an excessive amount of fluid.
Monofocal Type of spectacle lens, intraocular lens (IOL) or contact lens design that has only one area through which the eye focuses. A multifocal lens has more than one focal area, enabling sight at multiple distances, typically for people with presbyopia.
Bioptic telescopic lenses (BTL) Devices attached to glasses that provide extreme magnification, typically used for driving. For people with low vision who are qualified, telescopic lenses are attached above the driver's line of sight to help magnify objects such as road signs.
Presbyope Person who has difficulty reading print and seeing near objects.Boothe Eye Care
Druse Small yellow or white deposit in the eye. Drusen are sometimes signs of macular degeneration.
Myopia Also called nearsightedness. Condition in which the length of the eye is too long, causing light rays to focus in front of the retina rather than on it, resulting in blurred distance vision. Additional symptoms include eyestrain, poor night vision and squinting. (25 September 2007 Boothe Laser Center )
Dr. William Boothe article
Patau syndrome Also called Trisomy-13. Condition caused by an extra, third copy of chromosome 13. Symptoms include severe mental retardation, a small head, microphthalmia, a cleft lip or palate, heart defects and extra fingers or toes; many patients also have an iris coloboma and retinal dysplasia (abnormal development). The majority of infants with Patau syndrome die within the first year.
CK (Conductive Keratoplasty) Procedure in which a surgeon uses radio waves to heat collagen in the cornea's periphery to shrink it and reduce hyperopia (farsightedness). CK is also used to treat presbyopia. Read more about CK.( 19 February 2010 Online press article Boothe Eye Care )
Similar news you may find intriguing:
Boothe Laser Center, Dr. Boothe Lasik, Dr. William Boothe
Friday, August 27, 2010
Dr. William Boothe
High blood pressure : Also known as hypertension, high blood pressure is, by definition, a repeatedly elevated blood pressure exceeding 140 over 90 mmHg -- a systolic pressure above 140 with a diastolic pressure above 90.
Acrodermatitis enteropathica Rare inherited condition characterized by dermatitis, hair loss, diarrhea and zinc deficiency. The most common eye symptom is light sensitivity, but conjunctivitis and other symptoms may also be present.(12 June 2008 - Online article Dr. William Boothe )
Myasthenia gravis Weakness of the voluntary muscles, believed to be autoimmune in nature. Symptoms include double vision and eyelid ptosis; patients sometimes have non-eye symptoms as well, such as difficulty swallowing or using the arms and legs.
Lacrimal: Pertaining to tears, as in lacrimal gland (tear gland). From the Indo-European dakru meaning a tear (from a weeping eye) which gave rise to the Greek dakry and the Latin lacrima.
Progressive lenses Also called progressive addition lenses or PALs. Multifocal lenses whose corrective powers change progressively throughout the lens. A wearer looks through one portion of the lens for distance vision, another for intermediate vision, and a third portion for reading or close work. Each area is blended invisibly into the next, without the lines that traditional bifocals or trifocals have.
Toxocariasis Infection caused by Toxocara worms, which are typically found in cat and dog intestines. The form found in the eyes, ocular larva migrans, can cause vision loss.Dr. Boothe Dallas
Nausea: Nausea is the urge to vomit. It can be brought by many causes including, systemic illnesses, such as influenza, medications, pain, and inner ear disease.
Optic nerve problem The optic nerve (second cranial nerve) is the part of the eye that carries stimuli from the rods and cones to the brain. Problems such as inflammation (optic neuritis), tumors and swelling can lead to symptoms such as: blurred vision, loss of color vision, floaters, headache, eye pain or discomfort, nausea and vision loss. (28 April 2007 Boothe Eye Care )
Sodium: The major positive ion (cation) in fluid outside of cells. The chemical notation for sodium is Na+. When combined with chloride, the resulting substance is table salt.
Zyl Zylonite, or cellulose acetate, is a lightweight plastic often used in eyeglass frames. It often appears in laminated form, with layers in different colors, but it can also be made in mottled patterns to imitate natural tortoise shell or animal skins.( 08 September 2007 Blog article Dr. Boothe )
Other similar results you may find intriguing:
Dr. William Boothe Lasik, Dr. Boothe Lasik, Boothe Laser Center
Acrodermatitis enteropathica Rare inherited condition characterized by dermatitis, hair loss, diarrhea and zinc deficiency. The most common eye symptom is light sensitivity, but conjunctivitis and other symptoms may also be present.(12 June 2008 - Online article Dr. William Boothe )
Myasthenia gravis Weakness of the voluntary muscles, believed to be autoimmune in nature. Symptoms include double vision and eyelid ptosis; patients sometimes have non-eye symptoms as well, such as difficulty swallowing or using the arms and legs.
Lacrimal: Pertaining to tears, as in lacrimal gland (tear gland). From the Indo-European dakru meaning a tear (from a weeping eye) which gave rise to the Greek dakry and the Latin lacrima.
Progressive lenses Also called progressive addition lenses or PALs. Multifocal lenses whose corrective powers change progressively throughout the lens. A wearer looks through one portion of the lens for distance vision, another for intermediate vision, and a third portion for reading or close work. Each area is blended invisibly into the next, without the lines that traditional bifocals or trifocals have.
Toxocariasis Infection caused by Toxocara worms, which are typically found in cat and dog intestines. The form found in the eyes, ocular larva migrans, can cause vision loss.Dr. Boothe Dallas
Nausea: Nausea is the urge to vomit. It can be brought by many causes including, systemic illnesses, such as influenza, medications, pain, and inner ear disease.
Optic nerve problem The optic nerve (second cranial nerve) is the part of the eye that carries stimuli from the rods and cones to the brain. Problems such as inflammation (optic neuritis), tumors and swelling can lead to symptoms such as: blurred vision, loss of color vision, floaters, headache, eye pain or discomfort, nausea and vision loss. (28 April 2007 Boothe Eye Care )
Dr. Boothe article
Sodium: The major positive ion (cation) in fluid outside of cells. The chemical notation for sodium is Na+. When combined with chloride, the resulting substance is table salt.
Zyl Zylonite, or cellulose acetate, is a lightweight plastic often used in eyeglass frames. It often appears in laminated form, with layers in different colors, but it can also be made in mottled patterns to imitate natural tortoise shell or animal skins.( 08 September 2007 Blog article Dr. Boothe )
Other similar results you may find intriguing:
Dr. William Boothe Lasik, Dr. Boothe Lasik, Boothe Laser Center
Thursday, August 26, 2010
Dr. William Boothe - Graves' ophthalmology Article
Optic The rounded, central portion of an intraocular lens (IOL) used in cataract surgery. Optic also more generally refers to eyes or vision.
Graves' ophthalmology Autoimmune eye disorder usually associated with abnormalities of the thyroid gland; symptoms include eyelid retraction, bulging eyes, light sensitivity, eye discomfort, double vision, vision loss, a red or pink eye and a limited ability to move the eyes.(20 September 2008 - Online article Dr. Boothe )
Femtosecond laser Device that creates bursts of laser energy at an extremely fast rate measured in terms of a unit known as a femtosecond (one quadrillionth of a second). These ultra fast energy pulses precisely target and break apart tissue or other substances at a molecular level, without damaging adjacent areas.
Ophthalmoplegia Eye muscle paralysis. Causes include stroke, multiple sclerosis, a tumor, thyroid disease, migraines and progressive supranuclear palsies. Symptoms can include limited eye movement, blurred vision, double vision, nystagmus and ptosis. Tolosa-Hunt Syndrome, often called "painful ophthalmoplegia," is characterized by intense pain behind the eye and a headache.
Ophthalmic: Pertaining to the eye. An ophthalmic ointment is designed for the eye.
Sinusitis Inflammation of the sinuses, due to an infection or an allergic reaction. Probably the most common cause of pain in and around the eye. Symptoms include head pain (headache, pain around the eyes, toothache, jaw pain), nasal discharge, postnasal drip, coughing, eyelid swelling, swelling around the eyes, a stuffy nose, fatigue, bad breath and a sore throat.Dr. Boothe Laser Center
Graves' ophthalmology Autoimmune eye disorder usually associated with abnormalities of the thyroid gland; symptoms include eyelid retraction, bulging eyes, light sensitivity, eye discomfort, double vision, vision loss, a red or pink eye and a limited ability to move the eyes.(20 September 2008 - Online article Dr. Boothe )
Femtosecond laser Device that creates bursts of laser energy at an extremely fast rate measured in terms of a unit known as a femtosecond (one quadrillionth of a second). These ultra fast energy pulses precisely target and break apart tissue or other substances at a molecular level, without damaging adjacent areas.
Ophthalmoplegia Eye muscle paralysis. Causes include stroke, multiple sclerosis, a tumor, thyroid disease, migraines and progressive supranuclear palsies. Symptoms can include limited eye movement, blurred vision, double vision, nystagmus and ptosis. Tolosa-Hunt Syndrome, often called "painful ophthalmoplegia," is characterized by intense pain behind the eye and a headache.
Ophthalmic: Pertaining to the eye. An ophthalmic ointment is designed for the eye.
Sinusitis Inflammation of the sinuses, due to an infection or an allergic reaction. Probably the most common cause of pain in and around the eye. Symptoms include head pain (headache, pain around the eyes, toothache, jaw pain), nasal discharge, postnasal drip, coughing, eyelid swelling, swelling around the eyes, a stuffy nose, fatigue, bad breath and a sore throat.Dr. Boothe Laser Center
Friday, August 20, 2010
Dr. William Boothe Optometrist
Optometrist: A health care professional who is licensed to provide primary eye care services:
* to examine and diagnose eye diseases such as glaucoma , cataracts , and retinal diseases and, in certain states in the U.S., to treat them;
* to diagnose related systemic (bodywide) conditions such as hypertension and diabetes that may affect the eyes;
* to examine, diagnose and treat visual conditions such as nearsightedness , farsightedness , astigmatism and presbyopia ; and
* to prescribe glasses, contact lenses, low vision rehabilitation and medications as well as perform minor surgical procedures such as the removal of foreign bodies.
* Find a local Doctor in your town
Decongestant: A drug that shrinks the swollen membranes in the nose and makes it easier to breath. Decongestants can be taken orally or by nasal spray. Decongestant nasal sprays should not be used for more than five days without the doctor's advice, and if so, usually only when accompanied by a nasal steroid. Many decongestant nasal sprays often cause a rebound effect if taken too long. A rebound effect is the worsening of symptoms when a drug is discontinued. This is a result of a tissue dependence on the medication. Decongestants should not be used by patients with high blood pressure (hypertension) unless under doctor's supervision.
Radiation: 1. Rays of energy. Gamma rays and X-rays are two of the types of energy waves often used in medicine. 2. The use of energy waves to diagnose or treat disease. See also: Irradiation.
* to examine and diagnose eye diseases such as glaucoma , cataracts , and retinal diseases and, in certain states in the U.S., to treat them;
* to diagnose related systemic (bodywide) conditions such as hypertension and diabetes that may affect the eyes;
* to examine, diagnose and treat visual conditions such as nearsightedness , farsightedness , astigmatism and presbyopia ; and
* to prescribe glasses, contact lenses, low vision rehabilitation and medications as well as perform minor surgical procedures such as the removal of foreign bodies.
* Find a local Doctor in your town
Decongestant: A drug that shrinks the swollen membranes in the nose and makes it easier to breath. Decongestants can be taken orally or by nasal spray. Decongestant nasal sprays should not be used for more than five days without the doctor's advice, and if so, usually only when accompanied by a nasal steroid. Many decongestant nasal sprays often cause a rebound effect if taken too long. A rebound effect is the worsening of symptoms when a drug is discontinued. This is a result of a tissue dependence on the medication. Decongestants should not be used by patients with high blood pressure (hypertension) unless under doctor's supervision.
Radiation: 1. Rays of energy. Gamma rays and X-rays are two of the types of energy waves often used in medicine. 2. The use of energy waves to diagnose or treat disease. See also: Irradiation.
Friday, August 13, 2010
Dr. William Boothe - Dry eye Article
Rheopheresis The RHEO Procedure ("rheopheresis") is a method of blood filtration (apheresis) for treatment of dry age-related macular degeneration that removes large proteins and fatty components from the blood to improve circulation to macular cells at the back of the eye. For more information, please see our article on age-related macular degeneration.
Dry eye: A deficiency of tears. The main symptom is usually a scratchy or sandy feeling as if something is in the eye. Other symptoms may include stinging or burning of the eye; episodes of excess tearing that follow periods of very dry sensation; a stringy discharge from the eye; and pain and redness of the eye. Sometimes people with dry eye experience heaviness of the eyelids or blurred, changing, or decreased vision, although loss of vision is uncommon.(06 December 2008 - Online article Dr. Boothe Laser Center )
Contact lens drops Eyedrops for contact lens wearers; regular eyedrops can discolor contact lenses.
Iritis Inflammation of the iris.
Dry eye: A deficiency of tears. The main symptom is usually a scratchy or sandy feeling as if something is in the eye. Other symptoms may include stinging or burning of the eye; episodes of excess tearing that follow periods of very dry sensation; a stringy discharge from the eye; and pain and redness of the eye. Sometimes people with dry eye experience heaviness of the eyelids or blurred, changing, or decreased vision, although loss of vision is uncommon.(06 December 2008 - Online article Dr. Boothe Laser Center )
Contact lens drops Eyedrops for contact lens wearers; regular eyedrops can discolor contact lenses.
Iritis Inflammation of the iris.
Sunday, August 1, 2010
Dr. William Boothe Eye Care Article
Phacoemulsification Also called "phako," this in-office cataract surgery procedure involves using a device with a vibrating, ultrasonic tip to break up the cataract, then suctioning the pieces out with a tiny needle. Read our article about cataract surgery.
Jaundice Yellow coloring in the skin and eyes caused by high levels of a pigment called bilirubin. Jaundice is associated with a variety of conditions involving the liver, gallbladder and bile ducts, including hepatitis and cirrhosis.(27 June 2009 - Blog article Boothe Eye Center )
Jaundice Yellow coloring in the skin and eyes caused by high levels of a pigment called bilirubin. Jaundice is associated with a variety of conditions involving the liver, gallbladder and bile ducts, including hepatitis and cirrhosis.(27 June 2009 - Blog article Boothe Eye Center )
Friday, July 30, 2010
Keratoconjunctivitis - Eye Care Article
Apheresis A process in which blood is drawn outside the body, certain compounds are removed, and the blood is returned to the body. The technique has various applications, including: harvesting of needed components such as plasma or white blood cells; and removing harmful components such as large proteins, in order to treat the dry form of age-related macular degeneration (AMD). For more information, please see our article on age-related macular degeneration.
Keratoconjunctivitis: Inflammation of the eye involving both the cornea and the conjunctiva .(29 December 2007 - Online press Dr. Boothe )
Diabetic retinopathy Leaking of retinal blood vessels in advanced or long-term diabetes, affecting the macula or retina. Most people have no symptoms at first, but can develop blurred near vision, double vision, floaters, retinal/vitreous hemorrhages and metamorphopsia. In later stages, you can also suffer vision loss.
Contact lens problem Contact lens problems can range from minor to sight-threatening, and include protein build-up, debris on the lens, a ripped or nicked lens, infections and more. Symptoms can include frequent blinking, blurred vision, burning, discharge, foreign body sensation, itching, light sensitivity, eye pain or discomfort, a red or pink eye or lid and eyelid swelling.
Chalazion A small bump on the eyelid caused by an obstructed meibomian gland. Additional symptoms include light sensitivity, tearing and eyelid swelling. Chalazia are usually not painful unless they become infected. Read more about chalazia.
Cohort A term used in clinical studies to define a set of people who have something in common such as similar backgrounds, experiences, and/or health problems.Dr. William Boothe
Esotropia When one or both eyes point inward, so the eyes are "crossed." This is one type of strabismus.
Keratoconjunctivitis: Inflammation of the eye involving both the cornea and the conjunctiva .(29 December 2007 - Online press Dr. Boothe )
Diabetic retinopathy Leaking of retinal blood vessels in advanced or long-term diabetes, affecting the macula or retina. Most people have no symptoms at first, but can develop blurred near vision, double vision, floaters, retinal/vitreous hemorrhages and metamorphopsia. In later stages, you can also suffer vision loss.
Contact lens problem Contact lens problems can range from minor to sight-threatening, and include protein build-up, debris on the lens, a ripped or nicked lens, infections and more. Symptoms can include frequent blinking, blurred vision, burning, discharge, foreign body sensation, itching, light sensitivity, eye pain or discomfort, a red or pink eye or lid and eyelid swelling.
Chalazion A small bump on the eyelid caused by an obstructed meibomian gland. Additional symptoms include light sensitivity, tearing and eyelid swelling. Chalazia are usually not painful unless they become infected. Read more about chalazia.
Cohort A term used in clinical studies to define a set of people who have something in common such as similar backgrounds, experiences, and/or health problems.Dr. William Boothe
Esotropia When one or both eyes point inward, so the eyes are "crossed." This is one type of strabismus.
Tuesday, July 27, 2010
Apheresis- Dr. William Boothe Article
Apheresis A process in which blood is drawn outside the body, certain compounds are removed, and the blood is returned to the body. The technique has various applications, including: harvesting of needed components such as plasma or white blood cells; and removing harmful components such as large proteins, in order to treat the dry form of age-related macular degeneration (AMD). For more information, please see our article on age-related macular degeneration.
Entropion An abnormal turning in of an eyelid, which causes the lashes to rub on the ocular surface; usually due to aging. Additional symptoms include eye or lid pain or discomfort, foreign body sensation, a red or pink eye, itching, tearing and vision loss.(19 December 2009 - Press article Dr. William Boothe )
Bioptic telescopic lenses (BTL) Devices attached to glasses that provide extreme magnification, typically used for driving. For people with low vision who are qualified, telescopic lenses are attached above the driver's line of sight to help magnify objects such as road signs.
Papilloma Usually benign tumor, such as a wart or a skin tag; papillomas may be raised or flat, and can be a variety of colors, such as skin-colored, yellow, pink, brown or black. Eye papillomas are typically on the eyelid, but may also appear on the conjunctiva. The cause of papillomas is felt to be viral.
Xanthelasma A yellow, fatty spot or bump on the inner corner of either the upper eyelid, the lower one or both eyelids, often caused by a lipid disorder such as high cholesterol.
Lipid Organic compound that is oily, fatty, or waxy and commonly found in living cells. Lipids are one component of human tears, forming an oily outer layer that helps keep the eye moisturized by reducing evaporation of the watery and mucus layers beneath it. Lipids can collect on contact lenses, making them uncomfortable.Dr. Boothe
Atropine: A drug obtained from belladonna that is administered via injection, eye drops, or in oral form to relax muscles by inhibiting nerve responses. Used to dilate the pupils and as an antispasmodic .
Entropion An abnormal turning in of an eyelid, which causes the lashes to rub on the ocular surface; usually due to aging. Additional symptoms include eye or lid pain or discomfort, foreign body sensation, a red or pink eye, itching, tearing and vision loss.(19 December 2009 - Press article Dr. William Boothe )
Bioptic telescopic lenses (BTL) Devices attached to glasses that provide extreme magnification, typically used for driving. For people with low vision who are qualified, telescopic lenses are attached above the driver's line of sight to help magnify objects such as road signs.
Papilloma Usually benign tumor, such as a wart or a skin tag; papillomas may be raised or flat, and can be a variety of colors, such as skin-colored, yellow, pink, brown or black. Eye papillomas are typically on the eyelid, but may also appear on the conjunctiva. The cause of papillomas is felt to be viral.
Xanthelasma A yellow, fatty spot or bump on the inner corner of either the upper eyelid, the lower one or both eyelids, often caused by a lipid disorder such as high cholesterol.
Lipid Organic compound that is oily, fatty, or waxy and commonly found in living cells. Lipids are one component of human tears, forming an oily outer layer that helps keep the eye moisturized by reducing evaporation of the watery and mucus layers beneath it. Lipids can collect on contact lenses, making them uncomfortable.Dr. Boothe
Atropine: A drug obtained from belladonna that is administered via injection, eye drops, or in oral form to relax muscles by inhibiting nerve responses. Used to dilate the pupils and as an antispasmodic .
Saturday, July 24, 2010
Dr. William Boothe Eye Care Article - Toxoplasmosis
Burn: Damage to the skin or other body parts caused by extreme heat, flame, contact with heated objects, or chemicals. Burn depth is generally categorized as first, second, or third degree. The treatment of burns depends on the depth, area, and location of the burn, as well as additional factors, such as material that may be burned onto or into the skin. Treatment options range from simply applying a cold pack to emergency treatment to skin grafts.
Scrub: 1. As a verb, to wash the hands and forearms very thoroughly, as before engaging in surgery. To scrub implies the use of a brush (and often an implement to clean under the nails). To scrub, to scrub in (on a surgical procedure), and to scrub up are synonymous.
2. As a noun, a person who scrubs, as for surgery.
3. As an adjective, pertaining to scrubbing in for surgery, as a scrub nurse or a scrub tech.(20 November 2008 - Blog article Dr. William Boothe )
Fungal: Pertaining to a fungus. For example, a fungal skin infection.
Toxoplasmosis An infection caused by the Toxoplasma parasite, often from undercooked meat or contact with feces. It may occur in people with compromised immune systems. Symptoms are flu-like and can include swollen lymph nodes and muscle aches. Ocular toxoplasmosis causes inflammation of the eye's interior, leading to uveitis.
Anti-reflective coating (AR coating) Thin layer(s) applied to a lens to reduce the amount of reflected light and glare that reaches the eye. Read more about anti-reflective coatings.
Bioptic telescopic lenses (BTL) Devices attached to glasses that provide extreme magnification, typically used for driving. For people with low vision who are qualified, telescopic lenses are attached above the driver's line of sight to help magnify objects such as road signs.Dr. Boothe
Scrub: 1. As a verb, to wash the hands and forearms very thoroughly, as before engaging in surgery. To scrub implies the use of a brush (and often an implement to clean under the nails). To scrub, to scrub in (on a surgical procedure), and to scrub up are synonymous.
2. As a noun, a person who scrubs, as for surgery.
3. As an adjective, pertaining to scrubbing in for surgery, as a scrub nurse or a scrub tech.(20 November 2008 - Blog article Dr. William Boothe )
Fungal: Pertaining to a fungus. For example, a fungal skin infection.
Toxoplasmosis An infection caused by the Toxoplasma parasite, often from undercooked meat or contact with feces. It may occur in people with compromised immune systems. Symptoms are flu-like and can include swollen lymph nodes and muscle aches. Ocular toxoplasmosis causes inflammation of the eye's interior, leading to uveitis.
Anti-reflective coating (AR coating) Thin layer(s) applied to a lens to reduce the amount of reflected light and glare that reaches the eye. Read more about anti-reflective coatings.
Bioptic telescopic lenses (BTL) Devices attached to glasses that provide extreme magnification, typically used for driving. For people with low vision who are qualified, telescopic lenses are attached above the driver's line of sight to help magnify objects such as road signs.Dr. Boothe
Wednesday, July 21, 2010
Dr. William Boothe about Retinal detachment
Contact lens drops Eyedrops for contact lens wearers; regular eyedrops can discolor contact lenses.
Bioptic telescopic lenses (BTL) Devices attached to glasses that provide extreme magnification, typically used for driving. For people with low vision who are qualified, telescopic lenses are attached above the driver's line of sight to help magnify objects such as road signs.(26 February 2009 - Press article Dr. William Boothe )
Optic nerve problem The optic nerve (second cranial nerve) is the part of the eye that carries stimuli from the rods and cones to the brain. Problems such as inflammation (optic neuritis), tumors and swelling can lead to symptoms such as: blurred vision, loss of color vision, floaters, headache, eye pain or discomfort, nausea and vision loss.
Botulism Serious illness from a toxin produced by Clostridium bacteria (usually Clostridium botulinum). Infant botulism and food-borne botulism are the most common forms in the United States. Symptoms include double vision, blurred vision, ptosis, muscle weakness, difficulty speaking, difficulty swallowing, difficulty breathing and nausea.
Dilate: To stretch or enlarge. It comes from the Latin verb "dilatare" meaning "to enlarge or expand."
Primary: First or foremost in time or development. The primary teeth (the baby teeth) are those that come first. Primary may also refer to symptoms or a disease to which others are secondary.Dr. Boothe
Condition where the retina separates from the choroid. Retinal detachments have many causes, including aging, surgery, trauma, inflammation, high myopia and diseases such as diabetic retinopathy, retinopathy of prematurity and scleritis. Symptoms include light flashes, floaters, a shadow coming down over yourvision, blurred vision and vision loss. For more information, please see our retinal detachment article.
Hypoglycemia Abnormally low level of sugar (glucose) in the blood, which causes dizziness, hunger, shakiness and other symptoms. Skipping or delaying meals, too-small meals, or a high level of physical activity can cause hypoglycemia. Too much alcohol or certain drugs can also cause it. In diabetics, it can be caused by too much insulin.
Bioptic telescopic lenses (BTL) Devices attached to glasses that provide extreme magnification, typically used for driving. For people with low vision who are qualified, telescopic lenses are attached above the driver's line of sight to help magnify objects such as road signs.(26 February 2009 - Press article Dr. William Boothe )
Optic nerve problem The optic nerve (second cranial nerve) is the part of the eye that carries stimuli from the rods and cones to the brain. Problems such as inflammation (optic neuritis), tumors and swelling can lead to symptoms such as: blurred vision, loss of color vision, floaters, headache, eye pain or discomfort, nausea and vision loss.
Botulism Serious illness from a toxin produced by Clostridium bacteria (usually Clostridium botulinum). Infant botulism and food-borne botulism are the most common forms in the United States. Symptoms include double vision, blurred vision, ptosis, muscle weakness, difficulty speaking, difficulty swallowing, difficulty breathing and nausea.
Dilate: To stretch or enlarge. It comes from the Latin verb "dilatare" meaning "to enlarge or expand."
Primary: First or foremost in time or development. The primary teeth (the baby teeth) are those that come first. Primary may also refer to symptoms or a disease to which others are secondary.Dr. Boothe
Condition where the retina separates from the choroid. Retinal detachments have many causes, including aging, surgery, trauma, inflammation, high myopia and diseases such as diabetic retinopathy, retinopathy of prematurity and scleritis. Symptoms include light flashes, floaters, a shadow coming down over yourvision, blurred vision and vision loss. For more information, please see our retinal detachment article.
Hypoglycemia Abnormally low level of sugar (glucose) in the blood, which causes dizziness, hunger, shakiness and other symptoms. Skipping or delaying meals, too-small meals, or a high level of physical activity can cause hypoglycemia. Too much alcohol or certain drugs can also cause it. In diabetics, it can be caused by too much insulin.
Sunday, July 18, 2010
Dr. William Boothe Ophthalmologist
Sarcoidosis Disease in which granulomas (nodules of inflamed tissue) form in the lymph nodes, lungs, skin and other areas. The cause is unknown. Symptoms include fatigue, weight loss, fever, coughing, uveitis, cranial nerve palsies and skin lesions. Some patients also develop dry eyes.
Cerebral cortex Outer portion of the brain where complex functions including certain vision processes take place.(23 September 2009 - Blog article Dr. Boothe )
Rheumatoid arthritis Chronic, autoimmune, inflammatory disorder that mainly affects the joints. Symptoms include pain, stiffness, swelling and deformities. Rheumatoid arthritis may also cause eye burning, discharge and dryness. It can be associated with uveitis.
Ophthalmologist: An eye doctor. A physician practicing ophthalmology. An ophthalmologist is an M.D.
Blepharoconjunctivitis Inflammation of the eyelid and conjunctiva. Infections and allergic reactions are among the causes. Symptoms include a red or pink eye, a red or pink eyelid, pain or discomfort of the eye or around the eye, tearing, burning, eye dryness and eye stickiness.
Keratoconus Degeneration and thinning of the cornea resulting in a cone-shaped bulge (a type of irregular astigmatism). The cause is unknown, but may be genetic. The first symptom is blurred vision that doesn't improve enough with glasses (contacts usually work well for a while). You may also have double vision or distorted vision. Read our keratoconus articleDr. William Boothe
Iris: The iris is the circular, colored curtain of the eye. Its opening forms the pupil. The iris helps regulate the amount of light that enters the eye.
Cerebral cortex Outer portion of the brain where complex functions including certain vision processes take place.(23 September 2009 - Blog article Dr. Boothe )
Rheumatoid arthritis Chronic, autoimmune, inflammatory disorder that mainly affects the joints. Symptoms include pain, stiffness, swelling and deformities. Rheumatoid arthritis may also cause eye burning, discharge and dryness. It can be associated with uveitis.
Ophthalmologist: An eye doctor. A physician practicing ophthalmology. An ophthalmologist is an M.D.
Blepharoconjunctivitis Inflammation of the eyelid and conjunctiva. Infections and allergic reactions are among the causes. Symptoms include a red or pink eye, a red or pink eyelid, pain or discomfort of the eye or around the eye, tearing, burning, eye dryness and eye stickiness.
Keratoconus Degeneration and thinning of the cornea resulting in a cone-shaped bulge (a type of irregular astigmatism). The cause is unknown, but may be genetic. The first symptom is blurred vision that doesn't improve enough with glasses (contacts usually work well for a while). You may also have double vision or distorted vision. Read our keratoconus articleDr. William Boothe
Iris: The iris is the circular, colored curtain of the eye. Its opening forms the pupil. The iris helps regulate the amount of light that enters the eye.
Friday, July 16, 2010
Dr. William Boothe - Uveitis
Uveitis: Inflammation of the uvea, the part of the eye that collectively refers to the iris, the choroid of the eye, and the ciliary body. The uvea provides most of the blood supply to the retina. Uveitis as a rule signifies inflammation involving the iris, choroid, and ciliary body -- all three components of the uveal tract.
Ocular hypertension Condition in which the intraocular pressure of the eye is elevated above normal and which may lead to glaucoma.(09 June 2008 - Blog article Dr. Boothe )
Optometrist: A health care professional who is licensed to provide primary eye care services:
* to examine and diagnose eye diseases such as glaucoma , cataracts , and retinal diseases and, in certain states in the U.S., to treat them;
* to diagnose related systemic (bodywide) conditions such as hypertension and diabetes that may affect the eyes;
* to examine, diagnose and treat visual conditions such as nearsightedness , farsightedness , astigmatism and presbyopia ; and
* to prescribe glasses, contact lenses, low vision rehabilitation and medications as well as perform minor surgical procedures such as the removal of foreign bodies.
* Find a local Doctor in your town
Snellen chart Standard chart with letters, numbers, or symbols printed in rows of decreasing size used by eye care professionals in distance visual acuity testing. The chart was invented by Dutch ophthalmologist Hermann Snellen.
Cranial nerve One of the 12 pairs of nerves that go from the brain to other parts of the head. Those that affect the eyes and vision are the second cranial nerve (optic nerve), third (oculomotor), fourth (troclear), sixth (abducens) and seventh (facial). The optic nerve carries stimuli from the rods and cones to the brain. The third, fourth and sixth cranial nerves work with the eye muscles to control eye movement. The seventh cranial nerve works with the facial muscles to control facial movement (specifically the closure of the eyelids).
Ocular hypertension Condition in which the intraocular pressure of the eye is elevated above normal and which may lead to glaucoma.(09 June 2008 - Blog article Dr. Boothe )
Optometrist: A health care professional who is licensed to provide primary eye care services:
* to examine and diagnose eye diseases such as glaucoma , cataracts , and retinal diseases and, in certain states in the U.S., to treat them;
* to diagnose related systemic (bodywide) conditions such as hypertension and diabetes that may affect the eyes;
* to examine, diagnose and treat visual conditions such as nearsightedness , farsightedness , astigmatism and presbyopia ; and
* to prescribe glasses, contact lenses, low vision rehabilitation and medications as well as perform minor surgical procedures such as the removal of foreign bodies.
* Find a local Doctor in your town
Snellen chart Standard chart with letters, numbers, or symbols printed in rows of decreasing size used by eye care professionals in distance visual acuity testing. The chart was invented by Dutch ophthalmologist Hermann Snellen.
Cranial nerve One of the 12 pairs of nerves that go from the brain to other parts of the head. Those that affect the eyes and vision are the second cranial nerve (optic nerve), third (oculomotor), fourth (troclear), sixth (abducens) and seventh (facial). The optic nerve carries stimuli from the rods and cones to the brain. The third, fourth and sixth cranial nerves work with the eye muscles to control eye movement. The seventh cranial nerve works with the facial muscles to control facial movement (specifically the closure of the eyelids).
Tuesday, July 13, 2010
Dr. William Boothe - Nystagmus
Keratitis Inflammation of the cornea, caused by an infection or inflammatory process. Symptoms include eye pain or discomfort, light sensitivity, foreign body sensation, grittiness and tearing.
Ablation Removal. In vision, ablation refers to the surgical removal of eye tissue to correct a refractive error such as myopia. For example, in laser procedures such as LASIK and PRK, the excimer laser ablates, or removes, tissue from the cornea.(16 June 2009 - Blog article Dr. Boothe )
ANSI The American National Standards Institute is a private, non-profit organization that coordinates efforts to develop standards for manufacturing many different products, including eyeglass lenses. For example, certain ANSI standards define acceptable levels of impact resistance for safety eyewear.
Posterior chamber Part of the eye behind the iris and in front of the lens.
Episcleritis Inflammation of the episclera. The cause is usually unknown, but episcleritis may be associated with some systemic (e.g., autoimmune) diseases. Symptoms include a red or pink eye, eye pain or discomfort, light sensitivity and tearing.
Rapid and involuntary eye movement that is oscillating and non-chaotic. Blurred vision may result. Nystagmus typically affects infants and has a variety of causes.Dr. William Boothe
Arcus An opaque arc or ring around the peripheral cornea, this represents fatty or oily deposits in the cornea. It is usually seen in elderly people and is called arcus senilis. Arcus juvenilis is seen in people younger than 40 and often indicates high levels of cholesterol in the blood.
Ablation Removal. In vision, ablation refers to the surgical removal of eye tissue to correct a refractive error such as myopia. For example, in laser procedures such as LASIK and PRK, the excimer laser ablates, or removes, tissue from the cornea.(16 June 2009 - Blog article Dr. Boothe )
ANSI The American National Standards Institute is a private, non-profit organization that coordinates efforts to develop standards for manufacturing many different products, including eyeglass lenses. For example, certain ANSI standards define acceptable levels of impact resistance for safety eyewear.
Posterior chamber Part of the eye behind the iris and in front of the lens.
Episcleritis Inflammation of the episclera. The cause is usually unknown, but episcleritis may be associated with some systemic (e.g., autoimmune) diseases. Symptoms include a red or pink eye, eye pain or discomfort, light sensitivity and tearing.
Rapid and involuntary eye movement that is oscillating and non-chaotic. Blurred vision may result. Nystagmus typically affects infants and has a variety of causes.Dr. William Boothe
Arcus An opaque arc or ring around the peripheral cornea, this represents fatty or oily deposits in the cornea. It is usually seen in elderly people and is called arcus senilis. Arcus juvenilis is seen in people younger than 40 and often indicates high levels of cholesterol in the blood.
Saturday, July 10, 2010
Dr. William Boothe about Macular degeneration
Macular degeneration Disorder characterized by changes in the eye's macula that result in the gradual loss of central vision. The exact cause is unknown, but appears to be related to a genetic predisposition, smoking and several other risk factors. Central vision may be blurred, distorted (metamorphopsia) or shadowy before vision loss occurs.
Lutein An antioxidant that is found throughout the body, but is concentrated in the macula. Lutein is believed to help protect the eyes from free radical damage caused by the sun's harmful rays.(05 January 2009 - Online article Dr. William Boothe )
Foreign body Something in or on the eye that doesn't belong there. Symptoms include foreign body sensation, eye pain or discomfort, a red or pink eye, tearing, frequent blinking, blurred vision, discharge, light sensitivity and vision loss.
Arcus An opaque arc or ring around the peripheral cornea, this represents fatty or oily deposits in the cornea. It is usually seen in elderly people and is called arcus senilis. Arcus juvenilis is seen in people younger than 40 and often indicates high levels of cholesterol in the blood.
Daily wear These soft contact lenses are worn every day for six months up to a couple of years. They require daily cleaning and disinfecting, as well as a periodic enzymatic soak (usually once a week).
Phosphate: A form of phosphoric acid. Calcium phosphate makes bones and teeth hard.Dr. Boothe
Angle-closure glaucoma: This condition can be acute or chronic. It consists of increased pressure in the front chamber (anterior chamber) of the eye due to sudden (acute) or slowly progressive (chronic) blockage of the normal circulation of fluid within the eye. The block takes place at the angle of the anterior chamber formed by its junction of the cornea with the iris. This angle can be seen by simply looking at someone's eye from the side. Angle-closure glaucoma tends to affect people born with a narrow angle. People of Asian and Eskimo ancestry are at higher risk of developing it. Age and family history are risk factors. It occurs in older women more often than others. When the pupil of the eye is wide open (dilated), the iris is retracted and thickened and it block the canal of Schlemm, a key component of the drainage pathway for fluid within the eye. Blocking the drainage canal of Schlemm sends the pressure within the eye up. With acute angle-closure glaucoma, there is an abrupt increase in intraocular pressure (IOP) due to the buildup of aqueous (fluid) in the eye. The high pressure can damage the optic nerve (the nerve to the eye) and lead to blindness. The elevated pressure is best detected before the appearance of symptoms. That is why when the eyes are dilated in a doctor's office for a refraction, eye pressures are checked. When symptoms of acute angle glaucoma do develop, they include severe eye and facial pain, nausea and vomiting, decreased vision, blurred vision and seeing haloes around light. The eye in a far advanced case of angle closure glaucoma appears red with a steamy (clouded) cornea and a fixed (nonreactive) dilated pupil. Acute angle-closure glaucoma is an emergency because optic nerve damage and vision loss can occur within hours of the onset of the problem. Administering medications to lower the pressure within the eye is done first. In the past, a piece of the iris was then surgically removed in a procedure called an iridectomy to make a hole in the iris and create a channel (other than the canal of Sclemm) to permit the free flow of fluid. Today, a comparable procedure can be done by laser to burn a small hole in the iris to keep the intraocular pressure within normal limits. This condition can be chronic (progressing slowly or occurring persistently) or acute (occurring suddenly). Chronic angle-closure glaucoma, like the more common type of glaucoma (open-angle glaucoma), may cause vision damage without symptoms.
Lutein An antioxidant that is found throughout the body, but is concentrated in the macula. Lutein is believed to help protect the eyes from free radical damage caused by the sun's harmful rays.(05 January 2009 - Online article Dr. William Boothe )
Foreign body Something in or on the eye that doesn't belong there. Symptoms include foreign body sensation, eye pain or discomfort, a red or pink eye, tearing, frequent blinking, blurred vision, discharge, light sensitivity and vision loss.
Arcus An opaque arc or ring around the peripheral cornea, this represents fatty or oily deposits in the cornea. It is usually seen in elderly people and is called arcus senilis. Arcus juvenilis is seen in people younger than 40 and often indicates high levels of cholesterol in the blood.
Daily wear These soft contact lenses are worn every day for six months up to a couple of years. They require daily cleaning and disinfecting, as well as a periodic enzymatic soak (usually once a week).
Phosphate: A form of phosphoric acid. Calcium phosphate makes bones and teeth hard.Dr. Boothe
Angle-closure glaucoma: This condition can be acute or chronic. It consists of increased pressure in the front chamber (anterior chamber) of the eye due to sudden (acute) or slowly progressive (chronic) blockage of the normal circulation of fluid within the eye. The block takes place at the angle of the anterior chamber formed by its junction of the cornea with the iris. This angle can be seen by simply looking at someone's eye from the side. Angle-closure glaucoma tends to affect people born with a narrow angle. People of Asian and Eskimo ancestry are at higher risk of developing it. Age and family history are risk factors. It occurs in older women more often than others. When the pupil of the eye is wide open (dilated), the iris is retracted and thickened and it block the canal of Schlemm, a key component of the drainage pathway for fluid within the eye. Blocking the drainage canal of Schlemm sends the pressure within the eye up. With acute angle-closure glaucoma, there is an abrupt increase in intraocular pressure (IOP) due to the buildup of aqueous (fluid) in the eye. The high pressure can damage the optic nerve (the nerve to the eye) and lead to blindness. The elevated pressure is best detected before the appearance of symptoms. That is why when the eyes are dilated in a doctor's office for a refraction, eye pressures are checked. When symptoms of acute angle glaucoma do develop, they include severe eye and facial pain, nausea and vomiting, decreased vision, blurred vision and seeing haloes around light. The eye in a far advanced case of angle closure glaucoma appears red with a steamy (clouded) cornea and a fixed (nonreactive) dilated pupil. Acute angle-closure glaucoma is an emergency because optic nerve damage and vision loss can occur within hours of the onset of the problem. Administering medications to lower the pressure within the eye is done first. In the past, a piece of the iris was then surgically removed in a procedure called an iridectomy to make a hole in the iris and create a channel (other than the canal of Sclemm) to permit the free flow of fluid. Today, a comparable procedure can be done by laser to burn a small hole in the iris to keep the intraocular pressure within normal limits. This condition can be chronic (progressing slowly or occurring persistently) or acute (occurring suddenly). Chronic angle-closure glaucoma, like the more common type of glaucoma (open-angle glaucoma), may cause vision damage without symptoms.
Sunday, July 4, 2010
Dr. Boothe Eye Center - Other types of refractive surgery
Other types of refractive surgery
Radial Keratotomy or RK and Photorefractive Keratectomy or PRK are other refractive surgeries used to reshape the cornea. In RK, a very sharp knife is used to cut slits in the cornea changing its shape. PRK was the first surgical procedure developed to reshape the cornea, by sculpting, using a laser. Later, LASIK was developed. The same type of laser is used for LASIK and PRK. Often the exact same laser is used for the two types of surgery. The major difference between the two surgeries is the way that the stroma, the middle layer of the cornea, is exposed before it is vaporized with the laser. In PRK, the top layer of the cornea, called the epithelium, is scraped away to expose the stromal layer underneath. In LASIK, a flap is cut in the stromal layer and the flap is folded back.
Farsightedness- Farsightedness is another name for Hyperopia or Hypermetropia. Many Farsighted patients have difficulty seeing things up close, and often have crisp-acute distance vision.(19 January 2007 - Online blog Dr. Boothe Laser Center )
Excimer Laser- An excimer laser refers to a cool laser. Excimer lasers use cool beams of ultraviolet light to evaporate corneal tissue during vision correction.
Corneal Epithelium- The corneal epithelium is the thin, protective layer encasing the eyeball. Prior to LASIK eye surgery, the epithelium must be lifted or polished away to expose the underlying cornea. The epithelium is regenerative and heals quickly.
Acuity- Acuity refers to the sharpness or clarity of your vision.
Cornea- The cornea is the transparent front portion of the eyeball that covers the iris and pupil; it is continuous with the sclera.
Farsightedness, Hyperopia:
Farsighted people can usually see things that are far away better than things that are close. A farsighted prescription will have a positive number under the sphere column.Dr. Boothe Eye Care
Keratectomy- Keratos is the greek word for cornea, and ectomy means to remove. Together they mean to remove corneal tissue.
Precision Surgery
PRK is an outpatient procedure generally performed with local anesthetic eye drops. This type of refractive surgery gently reshapes the cornea by removing microscopic amounts of tissue from the outer surface with a cool, computer-controlled ultraviolet beam of light. The beam is so precise it can cut notches in a strand of human hair without breaking it, and each pulse can remove 39 millionths of an inch of tissue in 12 billionths of a second. The procedure itself takes only a few minutes, and patients are typically back to daily routines in one to three days.
Before the procedure begins, the patient's eye is measured to determine the degree of visual problem, and a map of the eye's surface is constructed. The required corneal change is calculated based on this information, and then entered into the laser's computer.
Since 1995, a limited number of laser systems has been approved by FDA to treat various refractive errors, both with PRK and LASIK.
According to FDA's Center for Devices and Radiological Health, clinical studies showed that about 5 percent of patients continued to always need glasses following PRK for distance, and up to 15 percent needed glasses occasionally, such as when driving. In addition, many patients experienced mild corneal haze following surgery, which is part of the normal healing process. The haze appeared to have little or no effect on final vision, and could only be seen by a doctor with a microscope. Some patients experienced glare and halos around lights. These conditions, however, diminished or disappeared in most patients in six months. For about 5 percent of patients, however, best-corrected vision without corrective lenses was slightly worse after surgery than before. In view of these findings, FDA and the Federal Trade Commission (which oversees advertising) issued a letter to the eye-care community in May 1996 warning that unrealistic advertising claims, such as "throw away your eyeglasses," and unsubstantiated claims about success rates could be misleading to consumers. (02 March 2009 Dr. Boothe )
At Laser Eye Center, our surgeons are the first to utilize LADARWavey® CUSTOMCORNEA® wavefront technology to measure and address both lower and higher order aberrations (visual imperfections in the eye's optical system). Unless both lower and higher order aberrations are addressed during laser vision correction, the quality of your vision may not be ideal, even if you have post-operative vision of 20/20.
Pupil- The pupil is the dark opening in the visible eye. It will open when more light is needed to see, and it will get smaller if less light is needed to see.( 15 August 2007 Blog article Dr. William Boothe )
Radial Keratotomy or RK and Photorefractive Keratectomy or PRK are other refractive surgeries used to reshape the cornea. In RK, a very sharp knife is used to cut slits in the cornea changing its shape. PRK was the first surgical procedure developed to reshape the cornea, by sculpting, using a laser. Later, LASIK was developed. The same type of laser is used for LASIK and PRK. Often the exact same laser is used for the two types of surgery. The major difference between the two surgeries is the way that the stroma, the middle layer of the cornea, is exposed before it is vaporized with the laser. In PRK, the top layer of the cornea, called the epithelium, is scraped away to expose the stromal layer underneath. In LASIK, a flap is cut in the stromal layer and the flap is folded back.
Farsightedness- Farsightedness is another name for Hyperopia or Hypermetropia. Many Farsighted patients have difficulty seeing things up close, and often have crisp-acute distance vision.(19 January 2007 - Online blog Dr. Boothe Laser Center )
Excimer Laser- An excimer laser refers to a cool laser. Excimer lasers use cool beams of ultraviolet light to evaporate corneal tissue during vision correction.
Corneal Epithelium- The corneal epithelium is the thin, protective layer encasing the eyeball. Prior to LASIK eye surgery, the epithelium must be lifted or polished away to expose the underlying cornea. The epithelium is regenerative and heals quickly.
Acuity- Acuity refers to the sharpness or clarity of your vision.
Cornea- The cornea is the transparent front portion of the eyeball that covers the iris and pupil; it is continuous with the sclera.
Farsightedness, Hyperopia:
Farsighted people can usually see things that are far away better than things that are close. A farsighted prescription will have a positive number under the sphere column.Dr. Boothe Eye Care
Keratectomy- Keratos is the greek word for cornea, and ectomy means to remove. Together they mean to remove corneal tissue.
Precision Surgery
PRK is an outpatient procedure generally performed with local anesthetic eye drops. This type of refractive surgery gently reshapes the cornea by removing microscopic amounts of tissue from the outer surface with a cool, computer-controlled ultraviolet beam of light. The beam is so precise it can cut notches in a strand of human hair without breaking it, and each pulse can remove 39 millionths of an inch of tissue in 12 billionths of a second. The procedure itself takes only a few minutes, and patients are typically back to daily routines in one to three days.
Before the procedure begins, the patient's eye is measured to determine the degree of visual problem, and a map of the eye's surface is constructed. The required corneal change is calculated based on this information, and then entered into the laser's computer.
Since 1995, a limited number of laser systems has been approved by FDA to treat various refractive errors, both with PRK and LASIK.
According to FDA's Center for Devices and Radiological Health, clinical studies showed that about 5 percent of patients continued to always need glasses following PRK for distance, and up to 15 percent needed glasses occasionally, such as when driving. In addition, many patients experienced mild corneal haze following surgery, which is part of the normal healing process. The haze appeared to have little or no effect on final vision, and could only be seen by a doctor with a microscope. Some patients experienced glare and halos around lights. These conditions, however, diminished or disappeared in most patients in six months. For about 5 percent of patients, however, best-corrected vision without corrective lenses was slightly worse after surgery than before. In view of these findings, FDA and the Federal Trade Commission (which oversees advertising) issued a letter to the eye-care community in May 1996 warning that unrealistic advertising claims, such as "throw away your eyeglasses," and unsubstantiated claims about success rates could be misleading to consumers. (02 March 2009 Dr. Boothe )
Dr. Boothe Eye Center article
Dr. Boothe Eye Center
At Laser Eye Center, our surgeons are the first to utilize LADARWavey® CUSTOMCORNEA® wavefront technology to measure and address both lower and higher order aberrations (visual imperfections in the eye's optical system). Unless both lower and higher order aberrations are addressed during laser vision correction, the quality of your vision may not be ideal, even if you have post-operative vision of 20/20.
Pupil- The pupil is the dark opening in the visible eye. It will open when more light is needed to see, and it will get smaller if less light is needed to see.( 15 August 2007 Blog article Dr. William Boothe )
Saturday, June 19, 2010
Boothe Laser Center article
LASIK is a surgical procedure intended to reduce a person's dependency on glasses or contact lenses. The goal of this Web site is to provide objective information to the public about LASIK surgery. See other sections of this site to learn about what you should know before surgery, what will happen during the surgery, and what you should expect after surgery. There is a glossary of terms and a checklist of issues for you to consider, practices to follow, and questions to ask your doctor before undergoing LASIK surgery.
The FDA does not have the authority to:
Regulate a doctor's practice. In other words, FDA does not tell doctors what to do when running their business or what they can or cannot tell their patients.
Set the amount a doctor can charge for LASIK eye surgery.
"Insist" the patient information booklet from the laser manufacturer be provided to the potential patient.
Make recommendations for individual doctors, clinics, or eye centers. FDA does not maintain nor have access to any such list of doctors performing LASIK eye surgery.
Conduct or provide a rating system on any medical device it regulates.
The first refractive laser systems approved by FDA were excimer lasers for use in PRK to treat myopia and later to treat astigmatism. However, doctors began using these lasers for LASIK (not just PRK), and to treat other refractive errors (not just myopia). Over the last several years, LASIK has become the main surgery doctors use to treat myopia in the United States. More recently, some laser manufacturers have gained FDA approval for laser systems for LASIK to treat myopia, hyperopia and astigmatism and for PRK to treat hyperopia and astigmatism.(22 June 2009 - Online press Dr. Boothe )
LASIK stands for Laser-Assisted In Situ Keratomileusis and is a procedure that permanently changes the shape of the cornea, the clear covering of the front of the eye, using an excimer laser. A mechanical microkeratome (a blade device) or a laser keratome (a laser device) is used to cut a flap in the cornea. A hinge is left at one end of this flap. The flap is folded back revealing the stroma, the middlesection of the cornea. Pulses from a computer-controlled laser vaporize a portion of the stroma and the flap is replaced. There are other techniques and many new terms related to LASIK that you may hear about.
Pupil- The pupil is the dark opening in the visible eye. It will open when more light is needed to see, and it will get smaller if less light is needed to see.
Astigmatism:
Astigmatism causes a distortion of vision, where a person may experience an overall blurriness. Information regarding an astigmatism is found in the cylinder column. Many people with myopia or hyperopia have some degree of astigmatism
Presbyopia:
LASIK surgeons cannot correct this age-related vision problem; it occurs in most individuals starting in the early 40s and progresses with age.
Muscles inside the eye lose flexibility and reading can become difficult.
People may have presbyopia in combination with another vision problem like nearsightedness.
The nearsightedness would be correctable by LASIK surgery, but the presbyopia would not; however, we may be able to find an adjustment to compensate for both.Dr. Boothe Laser Center
What the FDA regulates
In the United States, the Food and Drug Administration (FDA) regulates the sale of medical devices such as the lasers used for LASIK. Before a medical device can be legally sold in the U.S., the person or company that wants to sell the device must seek approval from the FDA. To gain approval, they must present evidence that the device is reasonably safe and effective for a particular use, the "indication." Once the FDA has approved a medical device, a doctor may decide to use that device for other indications if the doctor feels it is in the best interest of a patient. The use of an approved device for other than its FDA-approved indication is called "off-label use." The FDA does not regulate off-label use or the practice of medicine.
Corneal Epithelium- The corneal epithelium is the thin, protective layer encasing the eyeball. Prior to LASIK eye surgery, the epithelium must be lifted or polished away to expose the underlying cornea. The epithelium is regenerative and heals quickly. (26 January 2008 Dr. Boothe Eye Care )
LASIK- LASIK is an acronym that allows us to quickly say, "laser assisted in situ keratomileusis." This is more simply said as "reshaping the cornea using a laser."
Hyperopia or Hypermetropia- Many Hyperopic patients have difficulty seeing things up close, and often have crisp-acute distance vision.( 24 October 2007 Blog article Dr. Boothe Laser Center )
The FDA does not have the authority to:
Regulate a doctor's practice. In other words, FDA does not tell doctors what to do when running their business or what they can or cannot tell their patients.
Set the amount a doctor can charge for LASIK eye surgery.
"Insist" the patient information booklet from the laser manufacturer be provided to the potential patient.
Make recommendations for individual doctors, clinics, or eye centers. FDA does not maintain nor have access to any such list of doctors performing LASIK eye surgery.
Conduct or provide a rating system on any medical device it regulates.
The first refractive laser systems approved by FDA were excimer lasers for use in PRK to treat myopia and later to treat astigmatism. However, doctors began using these lasers for LASIK (not just PRK), and to treat other refractive errors (not just myopia). Over the last several years, LASIK has become the main surgery doctors use to treat myopia in the United States. More recently, some laser manufacturers have gained FDA approval for laser systems for LASIK to treat myopia, hyperopia and astigmatism and for PRK to treat hyperopia and astigmatism.(22 June 2009 - Online press Dr. Boothe )
LASIK stands for Laser-Assisted In Situ Keratomileusis and is a procedure that permanently changes the shape of the cornea, the clear covering of the front of the eye, using an excimer laser. A mechanical microkeratome (a blade device) or a laser keratome (a laser device) is used to cut a flap in the cornea. A hinge is left at one end of this flap. The flap is folded back revealing the stroma, the middlesection of the cornea. Pulses from a computer-controlled laser vaporize a portion of the stroma and the flap is replaced. There are other techniques and many new terms related to LASIK that you may hear about.
Pupil- The pupil is the dark opening in the visible eye. It will open when more light is needed to see, and it will get smaller if less light is needed to see.
Astigmatism:
Astigmatism causes a distortion of vision, where a person may experience an overall blurriness. Information regarding an astigmatism is found in the cylinder column. Many people with myopia or hyperopia have some degree of astigmatism
Presbyopia:
LASIK surgeons cannot correct this age-related vision problem; it occurs in most individuals starting in the early 40s and progresses with age.
Muscles inside the eye lose flexibility and reading can become difficult.
People may have presbyopia in combination with another vision problem like nearsightedness.
The nearsightedness would be correctable by LASIK surgery, but the presbyopia would not; however, we may be able to find an adjustment to compensate for both.Dr. Boothe Laser Center
What the FDA regulates
In the United States, the Food and Drug Administration (FDA) regulates the sale of medical devices such as the lasers used for LASIK. Before a medical device can be legally sold in the U.S., the person or company that wants to sell the device must seek approval from the FDA. To gain approval, they must present evidence that the device is reasonably safe and effective for a particular use, the "indication." Once the FDA has approved a medical device, a doctor may decide to use that device for other indications if the doctor feels it is in the best interest of a patient. The use of an approved device for other than its FDA-approved indication is called "off-label use." The FDA does not regulate off-label use or the practice of medicine.
Corneal Epithelium- The corneal epithelium is the thin, protective layer encasing the eyeball. Prior to LASIK eye surgery, the epithelium must be lifted or polished away to expose the underlying cornea. The epithelium is regenerative and heals quickly. (26 January 2008 Dr. Boothe Eye Care )
Boothe Laser Center article
LASIK- LASIK is an acronym that allows us to quickly say, "laser assisted in situ keratomileusis." This is more simply said as "reshaping the cornea using a laser."
Hyperopia or Hypermetropia- Many Hyperopic patients have difficulty seeing things up close, and often have crisp-acute distance vision.( 24 October 2007 Blog article Dr. Boothe Laser Center )
Sunday, June 13, 2010
Boothe Laser Center ~ Dr. William Boothe
Dr. Boothe Eye Center
Diopter- A diopter is one whole number on a prescription. The number of diopters on your prescription represents how much correction is needed to normalize your vision. The more myopic or hyperopic you are, the higher your prescription will be represented in diopters; or rather the farther away from zero your prescription will be.
Boothe Eye Center
PRK or Photorefractive Keratectomy- PRK is a corneal procedure where the superficial cornea is removed to improve vision. PRK is an Alternative to LASIK Eye Surgery.
WILL MY PROCEDURE BE PAINFUL?
Patients experience virtually no discomfort during the LASIK Vision Correction procedure. Eye drop anesthesia is used to numb the eye prior to the procedure, so no injections are necessary. Immediately after treatment, some patients have reported minor discomfort, like having an eyelash or a dry contact lens in their eye.
How Safe is LASIK Really?
Corrective laser eye surgery is extremely safe when performed by qualified doctors. Like any surgical procedure, there can be complications, but the complication rate is extremely low.
Results of clinical studies indicate the chances of having a vision-reducing complication from LASIK Eye Surgery are less than 1%. There have been no reported cases of blindness resulting from laser eye treatment in the United States.
Dr. Boothe Laser Center:
LASIK is a surgical procedure intended to reduce a person's dependency on glasses or contact lenses. The goal of this Web site is to provide objective information to the public about LASIK surgery. See other sections of this site to learn about what you should know before surgery, what will happen during the surgery, and what you should expect after surgery. There is a glossary of terms and a checklist of issues for you to consider, practices to follow, and questions to ask your doctor before undergoing LASIK surgery.
Nearsightedness- Nearsightedness is another name for Myopia. Nearsighted people typically have difficulty seeing objects at a distance. Nearsightedness can be so severe that people have difficulty seeing objects up close too.
Dr. Boothe
What is LASIK?
The eye and vision errors
The cornea is a part of the eye that helps focus light to create an image on the retina. It works in much the same way that the lens of a camera focuses light to create an image on film. The bending and focusing of light is also known as refraction. Usually the shape of the cornea and the eye are not perfect and the image on the retina is out-of-focus (blurred) or distorted. These imperfections in the focusing power of the eye are called refractive errors. There are three primary types of refractive errors: myopia, hyperopia and astigmatism. Persons with myopia, or nearsightedness, have more difficulty seeing distant objects as clearly as near objects. Persons with hyperopia, or farsightedness, have more difficulty seeing near objects as clearly as distant objects. Astigmatism is a distortion of the image on the retina caused by irregularities in the cornea or lens of the eye. Combinations of myopia and astigmatism or hyperopia and astigmatism are common. Glasses or contact lenses are designed to compensate for the eye's imperfections. Surgical procedures aimed at improving the focusing power of the eye are called refractive surgery. In LASIK surgery, precise and controlled removal of corneal tissue by a special laser reshapes the cornea changing its focusing power.
Microkeratome- A blade that creates a flap in the cornea during LASIK Surgery.
Boothe Eye Care
Farsightedness- Farsightedness is another name for Hyperopia or Hypermetropia. Many Farsighted patients have difficulty seeing things up close, and often have crisp-acute distance vision.
Dr. Boothe Eye Care
Optician- An optician makes glasses and performs adjustments on frames.
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