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East Asians short-sighted for snubbing outdoors

East Asians short-sighted for snubbing outdoors (click to read more)

Snubbing the outdoors for books, video games and TV is the reason up to nine in ten school-leavers in big East Asian cities are near-sighted, according to a study published on Friday.

Neither genes nor the mere increase in activities like reading and writing is to blame, the researchers suggest, but a simple lack of sunlight.

Exposure to the sun’s rays is believed to stimulate production of the chemical dopamine, which in turn stops the eyeball from growing elongated and distorting the focus of light entering the eye.

“It’s pretty clear that it is bright light stimulating dopamine release which prevents myopia,” researcher Ian Morgan of the Australian National University told AFP of the findings published in The Lancet medical journal.