A cataract is a loss of transparency or clouding of the lens of the eye. The normal lens is crystal clear. As one ages, however, chemical changes occur in the lens that make it less transparent, thereby obstructing the passage of light through the lens and affecting one’s clarity of vision.
Cataracts are not all the same and may be mild, moderate or severe.
Be careful! Sometimes, cataracts may cause an improvement in one’s near vision (thus reducing one’s reliance on reading glasses), giving a false impression that one’s vision is improving.