Staring at ANYTHING close to your face for a while will make your eyes get tired. And, if they don't have a chance to rest in between, they can be damaged. I have -3.50 in one eye, and -3.00 in the other. Although my dad wears glasses, my eyes seemed to degrade a lot faster during months that I was playing RuneScape (and other games) lots. Like I said before, RuneScape does not directly affect your vision, it it only the constant staring at the computer screen. On the official RuneScape website, it says that every few hours you should close your eyes for a few minutes, or look out a window to allow your eyes to rest. -~-In Some Skil-~-