You'd perhaps need something like this to come closer: >Microsoft patents eye-tracking keyboard software The idea’s just like swipe-based keyboard software, b

You'd perhaps need something like this to come closer: >Microsoft patents eye-tracking keyboard software The idea’s just like swipe-based keyboard software, but instead of tracking the motion of your fingertip, the system tracks eye movement. As your glance moves from key to key, darting around and changing direction, a devices camera records its gaze, and with a little algorithm magic, Microsoft tries to work out just which keys you were looking at – and ultimately, what word you were attempting to construct. http://pocketnow.com/2014/12/24/eye-tracking-keyboard http://pocketnow.com/2014/12/24/eye-tracking-keyboard