It's a common activity in today's digital world, leading some to fear blindness, researchers say
From: http://redirect.viglink.com?u=http%3A%2F%2Fwww.webmd.com%2Feye-health%2Fnews%2F20160622%2Fdoing-this-at-bedtime-could-temporarily-rob-your-sight%3Fsrc%3DRSS_PUBLIC&key=ddaed8f51db7bb1330a6f6de768a69b8
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