Overview
A cataract is a clouding of the normally clear crystalline lens of the eye. The lens is normally extremely clear, and allows light to pass through and be focused onto the retina. When the lens is not clear, and light is impeded from passing through it a cataract is said to be present in the lens. The term “cataract” comes from the Latin word for waterfall (cataracta) as very advanced cataracts may look white, like foamy water, and be visible to an observer with the naked eye.
