Mahroo went in a dark room and with one eye covered, gazed at a smartphone for 20 minutes before turning off the screen. "It did actually feel quite strange," he says of his self-experiment.

Popular Science has a post with dark mode instructions for computers and lots of other apps here. Ken Colburn is founder and CEO of Data Doctors Computer Services . Ask any tech question on ...

When we watch television or use a computer workstation in a completely dark or significantly darkened room, we create a less-than-ideal viewing situation wherein our eyes are staring very intently ...