cataracts what causes
Causes of cataracts. Most cataracts are due to age-related changes in the lens. However, other factors can contribute to their development including: 1  Diabetes mellitus âPersons with diabetes are at higher risk for cataracts. 2  Drugs âCertain medications have been found to be associated with the development of a cataract.
A cataract is a clouding of the eye's natural lens, which lies behind the iris and the pupil. Cataracts are the most common cause of vision loss in people over age 40 and is the principal cause of blindness in the world.