If your eyes are feeling dry, irritated, tired, and out of focus right now, you aren't alone.
These symptoms, along with head, neck, and back pain, afflict people who suffer from a malaise unique to our modern era: "digital eye strain." Nearly 90% of Americans are at risk for this issue, and more than 65% experience it, according to areport released January 6 by The Vision Council, an industry group.
The culprit for these eye issues — uncomfortable in the short term and potentially dangerous in the long term — is the amount of time we all spend staring at screens and the effect that the blue light those screens emit has on our eyes.
It doesn't take that much time to start causing these problems either. More than two hours in front of a screen can lead to eye-strain issues.
The Vision Council surveyed 10,329 representative US residents to see how much time we spend in front of screens and how it affects us. They found that we stare at screens all the time.
Source : http://www.techinsider.io/how-staring-at-a-screen-hurts-your-eyes-2016-6