Using A Smartphone In Bed Made Women Momentarily Blind

Two women woke up to find they were blind in one eye. Then their eyesight quickly returned to normal. The likely cause? They had been gazing at their smartphone screens in the dark. And a possible reason for why pirates wore eye patches.
Read more: http://www.npr.org/sections/health-shots/2016/06/22/482817177/using-a-smartphone-in-bed-made-women-momentarily-blind?source=Snapzu