Nutrition for eyes

Nutrient deficiencies can either directly affect eye function or increase the susceptibility to degenerative problems such as cataracts and macular degeneration.

Vitamin A in eye nutrition

Vitamin A deficiency is the leading preventable cause of blindness in the world. Vitamin A plays a role in maintaining the cornea and enhancing night vision through a compound known as visual purple. One of the first symptoms of vitamin A deficiency is night blindness, and prolonged deficiency leads to xerophthalmia, a condition in which eyes become dry, ulcers appear on the cornea, and the eyelids become swollen and sticky. This condition eventually leads to blindness.

Nutrition for eyes B vitamins

Several B vitamin deficiencies can lead to abnormal eye function. Riboflavin deficiency can cause aversion to bright light, dimness of vision and a burning and itching in the eyes. Low intake must occur for several months before these symptoms appear. A low level of riboflavin may also contribute to cataracts and macular degeneration. Low levels of vitamin B12 can also lead to poor vision.

Antioxidants

As oxidative damage is believed to play a role in the development of eye diseases, and in particular cataract and macular degeneration, many research studiesthe onset or progression of the disorders. Basic research studies have shown that antioxidants can protect against the cumulative effects of oxidative stress in animal models of cataract and macular degeneration. Epidemiological evidence in humans suggests that people with comparatively higher intakes or blood concentrations of antioxidant vitamins are at a reduced risk of cataract and macular degeneration.

 
 
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