NIHSeniorHealth: Cataract

What is a Cataract? Development and Risk Factors Symptoms and Detection Treatment and Prevention Frequently Asked Questions MedlinePlus for More Information Printer friendly version		Cataract Frequently Asked Questions 2. What is the lens? Click to enlarge image The lens is a clear part of the eye that helps to focus light, or an image, on the retina. The retina is the light-sensitive tissue at the back of the eye. (Answer continues on next page.)

		Return to list of Questions Next Page
Last reviewed: 09 April 2007 First published: 24 June 2005 National Institute on Aging, U.S. National Library of Medicine National Institutes of Health, U.S. Department of Health & Human Services Contact us, Accessibility, Copyright, Privacy