
[From article]
One study found that children who spent more time outdoors had a lower incidence of nearsightedness, probably because they rested their focusing eye muscles.
“We have something called the 20-20-20 rule, where we recommend every 20 minutes people should look at something at least 20 ft away for at least 20 seconds,” Dr. Rosenfield said.
The American Academy

http://newyork.cbslocal.com/
CBS News New York NY
Dr. Max Gomez: Smartphones, Tablets, And Laptops Could Cause ‘Digital Vision Syndrome’
November 21, 2014 7:56 PM
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