Keratometer An instrument that measures the curvature of the eye's clear, front surface (cornea). Keratometers help eye doctors collect information for contact lens fittings and surgical procedures. With keratometry, reflected images also can help identify dry eyes.
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Refractive surgery Surgery that corrects visual acuity, with the objective of reducing or eliminating the need for glasses and contacts. Includes radial keratotomy, PRK, LASIK, and corneal implants.
Photophobia: Painful oversensitivity to light. For example, there is photophobia in measles (rubeola). Keeping the lights dim or the room darkened may be useful. Sunglasses may also help.
Acetate Type of plastic often used in eyeglass frames.
Bacteria: Single-celled microorganisms which can exist either as independent (free-living) organisms or as parasites (dependent upon another organism for life).
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Substance:
1. Material with particular features, as a pressor substance.
2. The material that makes up an organ or structure. Also known in medicine as the substantia.
3. A psychoactive drug as, for example, in substance abuse. Dr. Boothe
Polycarbonate Plastic that is very impact-resistant, and is thus sometimes used for spectacle lenses and frames.
Fungal: Pertaining to a fungus. For example, a fungal skin infection.
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- Diabetic maculopathy Eye disease related to diabetes that creates swelling and abnormal leakage of fluids and fats into the macula, where fine focusing and central vision occur. Because of the location of eye damage, severe diabetic maculopathy can cause loss of central vision and blindness. Another form of diabetic eye disease is diabetic retinopathy.
