The lens is normally clear and helps focus light on the retina, the “film” at the back of the eye. Cataracts are like a dirty or fogged-up window in your eye. Cataract surgery removes that cloudy “window” and replaces it with a new clear one, letting light pass through properly so you can see clearly again.

The common reason for this change in eye vision is development of cataract in one eye or both eyes.
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