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Overview
The lens of an eye is normally clear. A cataract is when the lens becomes cloudy as you get older.
Review Date 9/3/2021
Updated by: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.