It's when you have spent lots os hours in front of a computer during a lot of hours, and your eyes are red, and you feel like your eyes are burning; specially if you've been playing very addictive videogames for a long time (for instance: +8 hours)
Guy 1.- Dude, you look burnt-eyed again, have you been playing WoW again?
Guy 2 .- Not really, I started at midnight farming some stuff for my guild.
Guy 1 .- Dude!! It's midday now!! I think you've got a serious problem, uh.....