Why is it bad to play video games in the dark

Yes and No. (This is for eyes.) It is bad depending on how dark it is. For example if you play video games at night and the only real main source of light is coming from the tv. (Clocks and Light coming from under the door, etc arent good enough to count) Then yes it is bad for your eyes. If you have a fan light or a desk light etc, on while playing it is no problem for your eyes. The best time to play is during the day when natural light huts your eyes. If your eyes hurt or water, take a half am hour break!