Generality/Definition
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In various studies and clinical trials antioxidant vitamins found in certain foods have been linked with eye health.
The general consensus of opinion is that with a good balanced diet that includes sufficient fresh fruits and vegetables there should be no need to use supplements. It is very important to consult your doctor first before taking a supplement.
Source: Nutrition and the eye (rnib.org.uk)
Prevention
Symptoms
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Vitamin C :Compared with nonusers, the risk for cataract is 60% lower.
Vitamin C, Vitamin E, Vitamin A:The Age-Related Eye Disease Study (AREDS) was a major study sponsored by the National Eye Institute (NEI). The study showed that treatment with antioxidants + zinc reduced the risk of progression of moderate macular degeneration to advanced macular degeneration by 25%.
Source: Nutrition, vitamins and eye vision AgingEye Knowledgebase (agingeye.net)
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Diagnosis
Treatment
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Vitamins A, C and E can be found in many different sources of fruit and vegetables such as oranges, kiwis, grapefruit, dried apricots, tomatoes, peppers, raw carrots, green leafy vegetables including kale and spinach, green peas, green beans and brussel sprouts.They can also be found in nuts, seeds, dairy products and eggs.
Lutein and Zeaxanthin can be found naturally in vegetables and fruit. For example, Lutein can be found in yellow peppers, mango, bilberries, and green leafy vegetables such as kale, spinach, chard and broccoli. Zeaxanthin can be found in orange sweet peppers, broccoli, corn, lettuce (not iceberg), spinach, tangerines, oranges and eggs.
Source: Nutrition and the eye (rnib.org.uk)
Illustrations
Information for specialists
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A large research trial, called the Age-Related Eye Disease Study' (AREDS), showed that high quantities of the antioxidant vitamins A, C, E, beta-carotene and the minerals zinc as zinc oxide, and copper as cupric oxide, can help to slow down the progression of AMD.
Source: Nutrition and the eye (rnib.org.uk)
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Scientists are warning that a flavouring, commonly found in Chinese food, could be linked to sight problems."Lesser amounts should be OK, but the precise borderline amount is still unknown."
"But once a week, it would be a miniscule amount in comparison with what these researches are putting into these rats. "If you have the odd take-away, I shouldn't worry."
Tests in rats have shown that high levels of monosodium glutamate (MSG) can damage the retina. MSG is found in oriental and processed foods. The research was carried out by scientists at Hirosaki University in Japan. They found rats fed on diets high in MSG suffered vision loss and had thinner retinas. If you have the odd take-away, I shouldn't worry Professor Peng Tee Khaw, Moorfields Eye Hospital But UK eye experts said people would have to eat an exceptionally large amount of MSG before they suffered problems, and eating a take-away once a week would not cause problems. The researchers theory of how MSG affects sight is that it binds to receptors on retinal cells, destroying them. This then triggers secondary reactions that reduce the ability of the cells which are left to relay electrical signals.
He suggested the study could explain why there is a high level of normal-tension glaucoma in eastern Asia.However, the higher rate could also be due to genetics.
Source: BBC NEWS | Health | Food additives 'affect sight' (news.bbc.co.uk)
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