Cataract (patient information)

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What is a cataract?

A cataract is a clouding of the lens in the eye that affects vision. Cataracts are very common in older people, as most cataracts are related to aging. Rarely, cataracts may be present at or shortly after birth.

A cataract can occur in either or both eyes, but it cannot spread from one eye to the other.

What are the causes of a cataract?

In many cases, the cause of cataract is unknown. However, factors that may contribute to cataract development are:

• Diseases that cause inflammation or affect metabolism
• Eye injury
• Family history
• Long-term use of corticosteroids or certain other medications
• Radiation exposure
• Smoking
• Too much exposure to ultraviolet light (sunlight)

Who is at risk for a cataract?

By age 80, more than half of all Americans either have a cataract or have had cataract surgery.

Where to find medical care for a cataract

Directions to Hospitals Treating a cataract

Sources

http://www.nei.nih.gov/health/cataract/cataract_facts.asp http://www.nlm.nih.gov/medlineplus/ency/article/001001.htm