One of many conditions treated by specialists at The Krieger Eye Institute, a cataract is a clouding of the lens of the eye.
The lens, located behind the iris, helps to focus light or an image on the retina, the light-sensitive tissue at the back of the eye. When a cataract forms, it becomes difficult for light to pass through the lens to the retina, and so vision becomes blurred. Cataracts usually develop with aging, but they occasionally occur in young children. Possible causes include:
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Eye injuries and certain diseases (such as diabetes)
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Unprotected exposure to ultraviolet (UV) light
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Smoking
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Certain medications (including corticosteroids and phenothiazine-related drugs)
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Previous eye surgery
With age-related cataracts, changes in vision tend to be gradual. In some cases, a new eyeglass prescription may improve vision at least temporarily.