Cataract Definition: Cataract is also used to mean a waterfall or where the flow of a river changes dramatically. It comes from the Greek word meaning "downrush" or "to dash down" or the Latin "cataract" meaning a waterfall, a floodgate or a portcullis.

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Cataracts - A cataract is a clouding of the natural lens, the part of the eye responsible for focusing light and producing clear, sharp images. ... When cataracts are mentioned, people often think of a film that grows on their eyes causing them to see ... For most people, cataracts are a natural result of aging. ...

Cataracts - VisionChannel - A cataract is the clouding or opacity that develops in the eye's lens. The crystalline lens is comprised primarily of protein and water. Normally, the protein is bonded in a way that allows light to pass through it. ... Amblyopia (lazy eye) Blepharitis. Cataracts. Color Vision Deficiency ... these clumps cloud the lens and block light. If left untreated, cataracts may eventually cause blindness ...

American Society of Cataract and Refractive Surgery - clinical and practice management information on cataract and refractive surgery.

Clinica Reinoso: Cataracts - offers information and animated diagrams about treatment.