Protein Large, complex organic molecules found in all living cells. These molecules contain enzymes, antibodies, hormones and other elements that help organisms function. Proteins are present in human tears and can collect on contact lenses, resulting in discomfort and cloudy vision.
Lens: The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain). The lens was named after the lentil bean because it resembled it in shape and size.(17 January 2010 - Online blog Dr. Boothe Lasik )
Acetate Type of plastic often used in eyeglass frames.
Conjunctivitis Inflammation of the conjunctiva, characterized by a pink eye. The cause is either infectious or allergic, though the term "pink eye" is commonly used for any type of conjunctivitis. Other symptoms include burning, discharge, dryness, itching, light sensitivity, eye pain or discomfort, stickiness, tearing and chemosis.
Trabecular meshwork Porous, spongy tissue within the drainage angle of the eye, through which fluids (aqueous humor) exit the eye.
Trauma: Any injury , whether physically or emotionally inflicted. "Trauma" has both a medical and a psychiatric definition. Medically, "trauma" refers to a serious or critical bodily injury, wound, or shock . This definition is often associated with trauma medicine practiced in emergency rooms and represents a popular view of the term. In psychiatry , "trauma" has assumed a different meaning and refers to an experience that is emotionally painful, distressful, or shocking, which often results in lasting mental and physical effects.Dr. William Boothe Lasik
Nodule: A small solid collection of tissue, a nodule is palpable (can be felt). It may range in size from greater than 1.0 cm (3/8 inch) to somewhat less than 2 cm (13/16 inch) in diameter. A nodule may be present in the epidermis, dermis or subcutis (at any level in the skin).
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. (25 July 2008 Dr. William Boothe Dallas )
Dr. Boothe article
Hyperopia Also called farsightedness. Condition in which the length of the eye is too short, causing light rays to focus behind the retina rather than on it, resulting in blurred near vision. Additional symptoms include eyestrain and squinting.
Ultraviolet (UV) The invisible part of the light spectrum whose rays have wavelengths shorter than the violet end of the visible spectrum and longer than X rays. UVA and UVB light are harmful to your eyes and skin.( 26 June 2008 Online press article Dr. Boothe Lasik )
Thursday, November 25, 2010
Saturday, November 20, 2010
Dr. William Boothe Eye Care
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 )
* 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 )
Saturday, November 13, 2010
Dr. William Boothe - Aberrometer
Mucormycosis Fungal infection typically occurring in the sinuses or lungs and mainly acquired by those with compromised immune systems and by diabetics. Symptoms include sinusitis, eye and facial pain, fever, a bulging eye and vision loss.
Sjogren's syndrome An inflammatory autoimmune disorder characterized by a dry mouth and dry eyes. Additional eye symptoms include burning, discharge, foreign body sensation, itching and light sensitivity.(11 August 2008 - Blog article Boothe Eye Care )
Cellulitis Inflammation of tissue around the eye. Pre-septal cellulitis affects the lid and other "outer" areas of the eye, whereas orbital cellulitis affects the "inner" areas around the eyeball. Pre-septal cellulitis symptoms include a red, swollen lid, swelling around the eyes and eye or lid pain or discomfort. Orbital cellulitis symptoms include a bulging eye and ophthalmoplegia, as well as a red, swollen lid, swelling around the eyes, eye or lid pain or discomfort and a decrease in vision. An orbital cellulitis is an ocular emergency.
Aspheric Not quite spherical. Aspheric eyeglass lenses are popular among people who have strong prescriptions because they are thin and lightweight, and reduce distortion and eye magnification. Aspheric contact lenses can work as a multifocal, or to correct a single-vision problem like astigmatism.
Melanin Pigment that colors the iris of the eye as well as other parts of the body, including skin and hair.
Epithelial ingrowth LASIK complication in which epithelial cells grow under the LASIK flap; epithelial ingrowth does not usually affect vision.Boothe Laser Center
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.
Descemet's membrane Corneal layer between the stroma and the endothelium. (19 September 2007 Dr. William Boothe Lasik )
Boothe Eye Center article
Aberrometer A device that can identify common and more obscure vision errors by measuring the way light waves travel through the eye's optical system.
Homocysteine An amino acid containing sulfur. A high homocysteine level in the blood is a possible risk factor for heart disease. One major study indicates that lowering homocysteine levels through vitamin B supplementation might help prevent diseases associated with impaired function of small blood vessels, such as macular degeneration. More studies are needed to verify such a link.( 14 May 2008 Online article Boothe Eye Center )
Sjogren's syndrome An inflammatory autoimmune disorder characterized by a dry mouth and dry eyes. Additional eye symptoms include burning, discharge, foreign body sensation, itching and light sensitivity.(11 August 2008 - Blog article Boothe Eye Care )
Cellulitis Inflammation of tissue around the eye. Pre-septal cellulitis affects the lid and other "outer" areas of the eye, whereas orbital cellulitis affects the "inner" areas around the eyeball. Pre-septal cellulitis symptoms include a red, swollen lid, swelling around the eyes and eye or lid pain or discomfort. Orbital cellulitis symptoms include a bulging eye and ophthalmoplegia, as well as a red, swollen lid, swelling around the eyes, eye or lid pain or discomfort and a decrease in vision. An orbital cellulitis is an ocular emergency.
Aspheric Not quite spherical. Aspheric eyeglass lenses are popular among people who have strong prescriptions because they are thin and lightweight, and reduce distortion and eye magnification. Aspheric contact lenses can work as a multifocal, or to correct a single-vision problem like astigmatism.
Melanin Pigment that colors the iris of the eye as well as other parts of the body, including skin and hair.
Epithelial ingrowth LASIK complication in which epithelial cells grow under the LASIK flap; epithelial ingrowth does not usually affect vision.Boothe Laser Center
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.
Descemet's membrane Corneal layer between the stroma and the endothelium. (19 September 2007 Dr. William Boothe Lasik )
Boothe Eye Center article
Aberrometer A device that can identify common and more obscure vision errors by measuring the way light waves travel through the eye's optical system.
Homocysteine An amino acid containing sulfur. A high homocysteine level in the blood is a possible risk factor for heart disease. One major study indicates that lowering homocysteine levels through vitamin B supplementation might help prevent diseases associated with impaired function of small blood vessels, such as macular degeneration. More studies are needed to verify such a link.( 14 May 2008 Online article Boothe Eye Center )
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
Subscribe to:
Posts (Atom)