The lens of an eye is normally clear. A cataract is when the lens becomes cloudy as you get older.
Reviewed last on: 8/22/2008
Paul B. Griggs, MD, Department of Ophthalmology, Virginia Mason Medical Center, Seattle, WA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.