what causes loss of vision


An in-depth report on the causes, diagnosis, treatment, and prevention of cataracts.


Cataracts are a common age-related vision problem. About 22 million Americans age 40 and older have cataracts, and the older a person gets the greater the risk for developing cataracts. Women are more likely to develop cataracts than men, and African-Americans and Hispanic Americans are at particularly high risk.

Colors appear faded

Difficulty reading due to reduced black-white contrast

Difficulty driving at night

Cataracts never go away on their own, but some stop progressing after a certain point. But if cataracts continue to grow and progress, they can cause blindness if left untreated. Fortunately, cataracts can almost always be successfully treated with surgery. Millions of cataract operations are performed each year in the United States, and there is a very low risk for complications. However, before opting for surgery, patients

need to consider on an individual basis how severely a cataract interferes with their quality of life. Cataract surgery is rarely an emergency, so patients have time to consult with their doctors and carefully consider the risks and benefits of surgery.

Cataract Removal Surgery

Surgery involves removing the cataract and replacing the abnormal lens with a permanent implant called an intraocular lens (IOL). The operation takes less than 1 hour and is performed on an outpatient basis. The procedure is generally painless and most patients remain awake, but sedated, during it. If you have cataracts in both eyes, doctors recommend waiting at least 1 month between surgeries.


A cataract is an opacity, or clouding, of the lens of the eye.

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The lens of an eye is normally clear. If the lens becomes cloudy or is opacified, it is called a cataract.


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