A new study at the University of Rochester has revealed that people who played action video games (in this case, Unreal Tournament) for just a month improved their visual acuity tests by about 20 percent.
Specifically, student test subjects were given a crowding test, which measured how well they could discern the orientation of a "T" within a crowd of other distracting symbols - a sort of electronic eye chart. Students were then divided into two groups.
The experimental group played Unreal Tournament, a first-person shoot-'em-up action game, for roughly an hour a day. The control group played puzzle game Tetris, a game described by the researchers as "equally demanding in terms of motor control, but visually less complex."
After about a month of near-daily gaming, the Tetris players showed no improvement on the test, but the Unreal Tournament players could tell which way the "T" was pointing much more easily than they had just a month earlier.
"Action video game play changes the way our brains process visual information," says Daphne Bavelier, professor of brain and cognitive sciences at the University of Rochester. "After just 30 hours, players showed a substantial increase in the spatial resolution of their vision, meaning they could see figures like those on an eye chart more clearly, even when other symbols crowded in."
Bavelier and graduate student Shawn Green tested college students who had played few, if any, video games in the last year. "That alone was pretty tough," says Green. "Nearly everybody on a campus plays video games."
The improvement was seen both in the part of the visual field where video game players typically play, but also beyond - the part of your vision beyond the monitor. The students' vision improved in the center and at the periphery where they had not been "trained." That suggests that people with visual deficits, such as amblyopic patients, may also be able to gain an increase in their visual acuity with special rehabilitation software that reproduces an action game's need to identify objects very quickly.
This research appears next week in the journal Psychological Science, and was funded by grants from the National Institutes of Health.