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Definition
By Mayo Clinic staffA cataract is a clouding of the normally clear lens of your eye. Looking through a cloudy lens is like trying to see through a frosty or fogged-up window. Clouded vision can make it more difficult to read, drive a car — especially at night — or see the expression on a friend's face. Cataracts commonly affect distance vision and cause problems with glare. They generally don't cause irritation or pain.
Most cataracts develop slowly and don't disturb your eyesight early on. But as the clouding progresses, the cataract eventually interferes with your vision. Early on, stronger lighting and eyeglasses can help you deal with vision problems. But if impaired vision jeopardizes your normal lifestyle, you might need surgery. Fortunately, cataract removal is generally a safe, effective procedure.
