Green Tea Helps to Fight Glaucoma
Good news, a research has revealed that green tea is effective in fighting the eye disease glaucoma.
According to Dictionary .com, glaucoma is "abnormally high fluid pressure in the eye, most commonly caused either by blockage of the channel through which aqueous humor drains (open-angle glaucoma or chronic glaucoma) or by pressure of the iris against the lens, which traps the aqueous humor (angle-closure glaucoma or acute glaucoma)."
Researchers from the Chinese University of Hong Kong had a group of mice drink 0.5 ml of water mixed with green tea powder for one week, and observed how much of each of the 7 types of catechins in green tea were absorbed by the mice' cornea, retina, and lens cells.
The astringent taste causing polyphenols called catechins in green tea are antioxidants. The researchers measured, after drinking green tea, how much of these antioxidants were remaining in the mice' eyes, 11 times over a 20 hour period. And it was found that the antioxidants in green tea were still reducing the oxidation stress on the eyes even 20 hours after drinking green tea. It was also observed that antioxidants such as Gallocatechin and Epigallocatechin in green tea were efficiently distributed among retina, aqueous humour, and other parts of the eye.
Glaucoma is an eye disease that is common in the old age, which can be caused by oxidative damage due to UV rays. And since this research has found the green tea's antioxdating effect to the eyes, this means green tea can reduce the risk of the disease by getting to the cause. The researchers concluded that "green tea constrains the oxidation stress on the eyes, thus promoting eye health."
The research finding was introduced in Journal of Agricultural and Food Chemistry, and American science news website EurekAlert and Science Daily on February 18, 2012.