Cataracts are white, opaque blemishes on the normally transparent lens of the eye that can go on to cause a gradual loss of vision. They occur as a result of damage to the protein structure of the lens. The majority of people over sixty years of age display some degree of cataract formation.
The condition has many different causes, the most common being diabetes, old age, glaucoma, smoking, genetics, trauma and certain types of medication. Several clinical studies have demonstrated that vitamin C supplementation can halt cataract progression and, in some cases, significantly improve vision. Carotenoid-like compounds, bilberry extract and vitamin E also help to stop progression of cataract formation by rising antioxidant levels.