3. Dry eye syndrome

When people are concentrating on looking at a screen, their blinking rate is reduced by a third. This leads to a higher level of tear evaporation which is one of the leading causes of dry eye syndrome. This can, eventually, lead to permanent eye damage, according to dailymail.co.uk.

Mobile Internet users browse online in Hangzhou, Zhejiang province, July 2014. [Photo/IC]