Eye Asteroids is the first eye-controlled arcade game, created by Tobii, a company that develops eye-tracking tech. Debuting at New York's Dave & Buster's arcade this week, the game has just one button, and you only press it once to start. Once you do, the game uses a strip of infrared sensors below the screen to scan your eyes and calibrate the system. The Earth stands in the middle of the scree, all you have to do is look at an incoming asteroid, pause slightly to shoot and move on to the next target. You can watch the video of it in action. Each machine costs a reported $15,000, and there will only be 50 made.