Nearly 60 percent of Americans are in front of some type of screen for five hours or more a day. Dr. Christopher Starr, an ophthalmologist at Weill Cornell Medical Center, joins "CBS This Morning" to discuss the health impacts of digital devices.
From: http://redirect.viglink.com?u=http%3A%2F%2Fwww.cbsnews.com%2Fvideos%2Fprevent-eye-strain-from-digital-screens-with-this-20-20-20-rule%2F&key=ddaed8f51db7bb1330a6f6de768a69b8
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