The lens of an eye is normally clear. If the lens becomes cloudy (opacified) it is called a cataract.
Review Date 11/10/2022
Updated by: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.