A cataract is a clouding of the lens in the eye. This condition is extremely common, affecting more than half of all Americans age 65 and over and may be corrected through surgery. Cataracts occur when there is a buildup of protein in the lens that makes it cloudy. This buildup prevents light from passing through the lens, causing some loss of vision. It is not known what causes the buildup of protein responsible for clouding the lens.

Some risk factors for Cataracts include:

Cataracts often form slowly and cause few symptoms. When symptoms are present, they can include:

Types of Cataracts

Some Cataracts may develop as a result of other diseases, like diabetes, or long-term exposure to toxic substances, certain medications (such as corticosteroids or diuretics), ultraviolet light, and radiation.