1. Cataracts World's Leading Cause of Vision Loss - US News and World Report
FRIDAY, Aug. 29 (HealthDay News) -- Cataracts -- the leading cause of vision loss and blindness in the United States and the world -- affect more than 22 million Americans aged 40 and older, says Prevent Blindness America.

2. Cataract : Causes, incidence, and risk factors  (Trust Mark: Doctor-Reviewed)
The lens of the eye is normally clear. If the lens becomes cloudy, the condition is known as a cataract. Rarely, cataracts may be present at or shortly after birth. These are called congenital cataracts. Adult cataracts usually develop with advanc...• Reviewer: Manju Subramanian, MD, Assistant Professor in Ophthalmology, Vitreoretinal Disease and Surgery, Boston University Eye Associates, Boston, MA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

3. Cataracts  (Trust Mark: Doctor-Reviewed)
A cataract is a cloudiness or opacity in the normally transparent crystalline lens of the eye. This cloudiness can cause loss of vision and may lead to eventual blindness.• Author: Teresa G. Odle