Your Phone vs. Your Eye

A Chinese man who is 26 years old  was diagnosed with a  rare condition retinal detachment because he was using his phone a lot in dark room that could lead to blindness if he didn't get a direct treatment. In addition, the smartphones screen have LED brightness which increase the brain activity and this may cause insomnia.

Recommendation: Don't use your phone, note tablet and laptops before you sleep and especially in a dark room instead read a book.