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.


Need Assistance?

Visit our Help & Resources page. Contact Us
Mon-Sat 7:30AM to 11:00PM ET
Sun 11:00AM to 8:00PM ET



Session Timeout

Your session will time out within 30 seconds.

Do you wish to continue your current session?

Session Timeout

Your session has expired. Please login again to continue.