http://vrworld.com/2016/10/26/google-acquires-eyefluence-daydream-vr/

Eyefluence is company founded by William Torch and Jim Maggraff, with the goals to create eye tracking system that measures the intent of your mind, not just the motions of your eyes in order to control technology. This new system would allow a user to control device through movements of users eyes. This kind of tech may seem unnecessary for present day smartphones and PC-s, but as the world of immersive computing continues to barrel towards us it will become infinitely more relevant. Google certainly thinks so as it has just acquired Eyefluence for itself.