Respuesta :
this question on Odysseware and the answer is
anxiety
headaches
blurry vision
depression
Your Vision Will Get Fuzzy
If you play shooting games or games involving inhumane actions to much it will influence you to do so in real life.
Headaches, mainly migrane headaches and of course the ongoing desire to play your game wherever you may be.
Hope this helped
Sincerely,
xPain