Cataract
Question: What is a
Cataract?
Answer: The lens is
made mostly of water and protein. The protein is arranged to let light pass
through and focus on the retina. Sometimes some of the protein clumps together.
This can start to cloud small areas of the lens, blocking some light from
reaching the retina and interfering with vision. This is a cataract.
In
its early stages, a cataract may not cause a problem. The cloudiness may affect
only a small part of the lens. However, over time, the cataract may grow larger
and cloud more of the lens, making it harder to see. Because less light reaches
the retina, your vision may become dull and blurry. A cataract won't spread
from one eye to the other, although many people develop cataracts in both eyes.
Although
researchers are learning more about cataracts, no one knows for sure what
causes them.Scientists think there may be several causes, including smoking,
diabetes, and excessive exposure to sunlight.
Question: Is Cataract
surgery effective?
Answer: Cataract removal
is one of the most common operations performed in the U.S. today. It is also
one of the safest and most effective. In about 90 percent of cases, people who
have cataract surgery have better vision afterward.
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