All About Cataracts -  What Causes Cataracts No one knows for sure why the eye's lens changes as we age, forming cataracts. Researchers are gradually identifying factors that may cause cataracts — and information that may help to prevent them. Many studies suggest that exposure to ultraviolet light is associated with cataracts, so eye care practitioners recommend especially in South Texas to wear sunglasses and a wide-brimmed hat to lessen your exposure. Other studies suggest people with diabetes are at risk for developing a cataract. The same goes for users of steroids, diuretics and major tranquilizers, but more studies are needed to distinguish the effect of the disease from the consequences of the drugs themselves. Some eye care practitioners believe that a diet high in antioxidants, such as beta-carotene (vitamin A), selenium and vitamins C and E, may forestall cataracts. Meanwhile, eating a lot of salt may increase your risk. Other risk factors include cigarette smoke, air pollution and heavy alcohol consumption. A small study found lead exposure to be a risk factor as well, but larger studies are needed to confirm whether lead can definitely put you at risk.
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