A cataract is simply a cloudy lens inside the eye. Cataracts commonly develop as a result of aging, but they can also be caused by disease, trauma, and certain medications.
How Cataracts Form
Most cataracts are caused by a change in the chemical composition of the lens. Many doctors believe that years of exposure to sunlight may play a major role in this process. A cataract can develop so slowly the affected person isn`t even aware of it.
While cataracts on the edge of the lens may have no noticeable effect on vision, cataracts in the center of the lens cause eyesight to become cloudy and yellowish. Cataracts can cause difficulty with glare, bright sunlight, driving at night, and problems with reading.
When a cataract seriously interferes with normal vision and activities, corrective surgery may be required. The cloudy lens is surgically replaced with an artificial lens called and (IOL). Most people can return to normal activities within a day or two of the procedure.
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