Ultraviolet radiation in sunlight, cigarette smoking, and the use of certain medications are among the risk factors for cataract development. Cataracts usually develop in both eyes, but often at different rates. Unfortunately there is no proven medical treatment to prevent, delay, or reverse the development of cataracts in adults. Many medical agents are under investigation, but none have been proven absolutely effective. There is evidence however that anti-oxidants, specifically vitamins A, C, and E may delay the development of cataracts.
Cataracts can cause many different visual effects.
Some types of cataracts can reduce close vision more than far vision and visa versa. Some cataracts will reduce distance and near vision. Cataracts often increase glare that creates halos around headlights or street lights. Glare can also significantly decrease vision on very bright days. Cataracts can also change the power of the human lens and thus the lens power needed for glasses.