Here's something that you can tell your mom the next time she tells you to stop playing all them darn action videogames. A recent study conducted by the University of Rochester produced results that show some action-based videogames may actually improve eyesight.

The study went like this: A group of students were divided into control groups and given a crowding test where the students in each group were asked to identify the orientation of the letter T on a page full of other distracting symbols and letters. The students' response times were recorded for later comparison. The test groups were then given games to play for a month. One group got Tetris while the other was given Unreal Tournament.