There's some good news for you fast-paced gaming junkies out there - action video games are actually good for your eyes! Check out this news story: "Study: Video games are good for eyes."
According to the article, "A study by the University of Rochester showed that people who played action video games for a few hours a day over the course of a month improved their vision by about 20 percent. ... Test subjects were given an eye test similar to the one used at regular eye clinics and then divided into two groups--one played shoot-'em-up action games for an hour a day while the control group played a less visually complex game. Their vision was tested after the study, with those who played the action game scoring better in the eye test."
I've played a few games that affected my vision after hours of rigorous viewing. They enhanced my vision so well that I could even see the graphics after I shut down the gaming console! How's that for an improvement?