From Live Science:
This Week’s Question: I have to have cataract surgery and I’m a little frightened. Should I be?
I don’t know anyone who isn’t a little frightened by surgery of any kind, but cataract removal is one of the safest and most effective types of surgery. It’s also one of the most common operations performed in the United States. About 9 out of 10 people who have the surgery have improved vision.
A cataract is a clouding of the lens, the clear part of the eye that helps focus images like the lens in a camera. Cataracts can blur images and discolor them.
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