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A cataract is a clouding of the lens in the eye that affects vision. Most cataracts are related to aging. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery.

A scene as it might be viewed by a person with Cataract:
Cataract
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Cataracts

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This page was last modified in December 2008

U. S. Department of Health and Human Services

National Institutes of Health

USA.gov