Natural resources that can help our visual health and to fight against cataracts. Both in combination as themselves, antioxidants provide a blanket of care against diseases of the eye, including cataracts.
In a study of 500 non-diabetic women with cataracts, it was found that vitamin C can have a significant negative relationship with the nuclear opacity, a factor of cataracts. Researchers from Department of Agriculture reported that U.S. vitamin C, vitamin E or a multivitamin reduced the prevalence of nuclear opacities, the prevalence was even lower in women who took vitamin C for 10 years or older.
Not all vitamins and their precursors are beneficial to all victims of the falls. In a study 12 years ago, which included 22,000 male doctors, we were provided 50 gr. beta-carotene or placebo every other day, and results in people without risk factors beta carotene did not provide benefits.
However, in smokers, beta carotene served to mitigate the risk of cataracts by 25 percent.
The formation of cataracts is the result of the exposure of eyes to light, particularly ultraviolet (UV). In laboratory experiments with animals, rats deficient in vitamin E and zinc were exposed to UV-A and UV-B in the research, specialists found deficiencies due to damage from UV rays on the cornea and lens rats.
As in the case of macular degeneration, lutein has some action in the prevention of cataracts. Lutein only demonstrated to have improved vision in those who already have cataracts. The researchers divided the 17 patients with cataracts in three groups giving: lutein 15g, 100g of vitamin E and placebo, three times a week for two years. The serum levels of lutein and vitamin E increased, although the statistical differences in the improvement of visual acuity and sensitivity compared to background levels, are only observed in the lutein group.
Lutein supplements can increase macular pigment density, which could reduce the effects of chromatic aberration and increase sensitivity. The improvement in vision in patients with lutein supplement may be related to acute and chronic effects in the retina and the maintenance of health and functional integrity of the retina and lens.
In addition to lutein, other carotenoids, and even flavonoids, have effect against cataracts. A carotenoid, lycopene, shown to help those with diabetes-induced cataracts caused by osmotic stress with a weakening of antioxidant defense mechanisms. And a flavonoid, quercetin, inhibiting effects for diabetic cataract formation.
Other options, based on medicinal plants are the grape seed extract (GSE), ginkgo and green tea. The GSE, provided rats with hereditary cataracts, significantly prevented and postponed the formation of cataracts. This suggests that they contain procyanidins, and their metabolites antioxidant, prevented the progression of cataract formation. The larger molecular procyanidins in the GSE might contribute to this activity anticataratas.
In a study of India, the ginkgo was useful to combat the formation of cataracts, for its antioxidant abilities. With an extract EGb761 used in rats in which the cataract was induced, we found that easily wiped reactive oxygen and nitrogen, inhibiting the oxidative changes occurring proteins. Also incorporated in intact cells and protect against stress, and prevented the nuclear DNA of simple breaks. In particular, the extract significantly delayed the progress of lens opacity in vivo.
For the improvement of the falls, polyphenols (aroma chemicals) in green tea can become the ticket for a clearer view. In experiments with rats, green tea reduced the presence of selenium in the falls, caused by the stress in the ocular lens.
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