Disease Awareness Glossary

Learn the meaning of terms related to eye conditions and diseases.

Amblyopia - A condition resulting in the functional non-use of one eye due to a problem of focusing an image on the retina; also known as "lazy eye."

Astigmatism - A condition that occurs when the cornea is misshapen to some degree, causing light to focus improperly on the retina.

Cataracts - A condition caused by a clouding of the internal lens of the eye, causing blurred or distorted vision.

Color Vision Deficiency - A genetically inherited trait in which the ability to distinguish some colors is less than normal.

Diabetic Retinopathy - Associated with diabetes, an eye disease that can lead to blindness.

Farsightedness - The common term for hyperopia.

Floaters - Small, cloudy specks of various sizes that form in the vitreous fluid of the eye.

Glaucoma - An eye disease in which the internal pressure of the eye increases; it may cause permanent damage to the optic nerve, leading to blindness if not properly treated.

Hyperopia - Farsightedness; a condition in which close-up objects appear blurred

Keratoconus - A disease in which the cornea becomes misshapen, causing blurry vision.

Macular Degeneration - A disease in which the macula undergoes vascular or aging changes that may lead to the loss of central vision if untreated.

Myopia - Nearsightedness; a condition in which distant objects appear blurred.

Nearsightedness - The common term for myopia.

Presbyopia - A condition related to the normal aging process, in which it becomes difficult to focus on close-up objects.

Refraction - The eye's natural ability to focus light rays properly on the retina.

Strabismus - A condition in which difficulty with eye muscle balance and coordination causes one or both eyes to turn in, out, up or down.