Cataracts are turbidity on eyepiece which can cause blindness. Turbidity is a natural process along with the population ages. Although treatable with surgery but cataracts can be prevented.
Some studies find people who have high levels of antioxidants in the body, including vitamin C, the risk for suffering from cataracts.
However, most research is done on the population in Western countries. Therefore researchers are trying to do some research by engaging respondents from developing countries like India where sufficiency rate of vitamin C of his still low and the prevalence of kataraknya is quite high.
For this study, researchers are evaluating more than 5,600 adults in India who are aged over 60 years. The respondents interviewed regarding diet and lifestyle as well as the taking of blood samples to measure the levels of vitamin C in the body.
In General, nearly 73 per cent of participants in the study suffered from cataracts. But people who have high enough levels of vitamin C, the risk is reduced to 39 percent compared with a vitamin deficiency.
In the research that most respondents lack of vitamin C, even almost 30 per cent have vitamin C concentrations below the lower limit of detection (less than 2 mikromoles per liter). Whereas under 11 mikromoles per liter already belongs to a deficiency of vitamin C.
The results of this research was published in the journal Ophtalmology. But not concluded that the adequacy of vitamin C will prevent cataracts.
Even so, senior researcher Astrid Fletcher, say vitamin C is an antioxidant which can protect the body from free radicals.
"Research in laboratory animals suggests vitamin C had a vital role to protect the lens of the eye from oxidative stress," he said.
The eyes, according to him, are particularly susceptible to oxidative stress. "The light is very important for eyesight but light is also very damaging. Eyepiece ultarviolet, absorbing the radiation from the primary source of oxidative stress, "he explained.
Several studies conducted in developed countries did not show the same results with in India. Fletcher holds halitu because people from developed countries have a good nutritional status so that an extra dose of vitamins from supplements is not enough help.
"Vitamin C dissolves in water so that the benefits are easily removed. Besides taking any vitamin supplements difficult to emulate the effect of vitamins from food, "he said.
Foods that are full of vitamin C include fruits, kiwi, strawberry, broccoli, tomatoes.
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