This is the best summary I could come up with:
"We think that outdoor time is the best form of prevention for nearsightedness," says Dr. Noha Ekdawi, a pediatric ophthalmologist in Wheaton, Ill.
If they develop high myopia, it can increase the risk of serious eye problems down the road, such as retinal detachments, glaucoma and cataracts.
He knew from animal studies that light stimulates the eye to release the neurotransmitter dopamine, which can slow the eyeball from stretching.
At the time, Wu's young son was starting first grade, and he worried about Taiwan's sky-high rates of myopia.
And after decades of trending upward, the rate of myopia among Taiwan's elementary school students began falling – from an all-time high of 50% in 2011 down to 45.1% by 2015.
Other studies have found that outdoor time can reduce the chances that kids will develop myopia even if they're doing lots of near work, such as reading or looking at screens – something that has also risen dramatically in recent years.
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