My my technology is advancing quite rapidly these days. This video describes how players can play the game with the use of eye tracking powered by Tobii T120 eye tracker. Eye tracking is the process of measuring either the point of gaze (“where we are looking”) or the motion of an eye relative to the head. An eye tracker is a device for measuring eye positions and eye movement. Eye trackers are used in research on the visual system, in psychology, in cognitive linguistics and in product design. Basically, you can just move the cross air with your eye and click a zombie to obilivion.