What Is A
Cataract?
A cataract is a cloudy area in the lens of the eye that
affects vision.
A normal lens is clear. It lets light pass to the retina,
the light-sensitive tissue at the back of the eye.
As a cataract develops, it becomes harder for a person to
see. Vision may become cloudy or blurry, and colors may
fade.
Most people have a cataract in both eyes. One eye may be
worse than the other, however, because each cataract develops
at a different rate. Some people with a cataract don't even
know it.
Their cataract may be small, or the changes in their vision
may not bother them very much. Other people cannot see well
enough to do the things they need or want to do.
Who Is Affected?
Most cataracts are related to aging. About half of Americans
ages 65 to 74 have a cataract. About 70 percent of those age 75
and older have this condition.
However, other conditions can increase the risk of
developing cataracts. Examples include diabetes, smoking and
alcohol use, and prolonged exposure to sunlight.
How Is a Cataract Treated?
Surgery is used to remove a cataract when vision loss
interferes with everyday activities such as driving, reading,
or watching TV.
If you have cataracts in both eyes, the surgery will be
performed on each eye at separate times, usually 4 to 8 weeks
apart. In 90 percent of cases, people who have cataract surgery
have better vision afterwards.
Reference for Cataract
Article
National Institutes of
Health
Health
Related Websites
The National Cancer
Institute
The National Eye
Institute
The National Heart, Lung,
and Blood Institute
National Institute on
Aging
National Institute of
Allergy and Infectious Diseases
National Institute of
Arthritis and Musculoskeletal and Skin Diseases
National Institute of
Diabetes and Digestive and Kidney Diseases
National Institute on Drug
Abuse
National Institute of Mental
Health
National Institute of
Neurological Disorders and Stroke
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