Glossary of Common Eye & Vision Conditions

Common Eye & Vision Conditions

The American Optometric Association provides doctor-reviewed, doctor-approved information about the most common eye conditions. Find out more below. If you are having vision or eye problems, see an AOA-member optometrist today.

Acanthamoeba is among the most common organisms found in the environment, though it hardly ever causes an infection. When one does happen, though, it is often very serious and can impact your vision.

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An Accommodative Dysfunction is a specific type of eye focusing issue that impacts the ability of a child or young adult to properly accommodate their eyes. The eyes’ ability to focus is an essential visual role that allows individuals to read and accomplish a variety of tasks on a daily basis.

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Anterior uveitis is known as an inflammation condition of the central layer of the eye. This layer consists of the iris as well as the adjacent tissue that is identified as the ciliary body. If left untreated, the inflammation can result in permanent damage as well as vision loss due to the advancement of cataracts, glaucoma, or even retinal edema.

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It is referred to as any opacity or cloudiness of the eye’s natural lens, which is generally transparent. There are numerous kinds of cataracts. Some are considered small and don’t interfere at all with a person’s vision, while others are considered large and can result in significant loss of vision.

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Color blindness is when your eyes don’t see colors the way that they are supposed to. Instead, your eyes see a difference in the light rays that hit them. It is similar to the way that you hear different sounds as high or low, which is known as pitch, and it relates to the sound frequency or the number of times it vibrates during a given moment.

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It is defined as a cut or scrape on the cornea’s outermost surface. The cornea is located on the front of the eye—the clear part—and actually has multiple layers. The most superficial layer is known as the epithelium. The cornea covers up the iris (the colored portion of the eye) as well as the pupil.

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If your eyeball is too long or your cornea is too curved, the light that will enter the eye will be unable to properly focus. Images will focus in the front of your retina, which is the light sensitive area of the eye, as opposed to directly on your retina. This can result in blurred vision, which is also called a refractive error.

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Also referred to as nyctalopia, night blindness is a condition that makes it difficult to see well in poor light or at night. While it is not a disease, night blindness is a symptom of another eye problem like nearsightedness that has been left untreated.

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