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A cataract is a clouding of the lens of the eye, which is usually clear. Most cataracts develop slowly.

Symptoms of cataracts include:

• Clouded or blurry vision.
• Trouble seeing at night.
• Sensitivity to light and glare.

When a cataract starts to make usual activities difficult, the cloudy lens can be replaced with a clear, artificial lens with surgery. This is generally a safe, outpatient procedure.