You might not realize virtual reality has an owl problem, but it does. Turn your head while wearing most VR headsets, and the scene you see will move accordingly; flick just your eyes around, however, and nothing happens. Startup FOVE believes it has the answer, a VR rig that can track eye-movement and in the process not only make games and entertainment more immersive, but potentially allow them to be run from something as humble as a smartphone.

To get around the reliance of existing VR headsets – like Oculus Rift and HTC VIVE – on movement of the headset itself, the FOVE team has embedded two infrared cameras into the eyepieces. Mounted just below each lens, and using some clever angling so as to not get in the way of your line-of-sight, they can track pupillary movement.
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https://www.slashgear.com/fove-headset-hits-kickstarter-for-eye-tracking-vr-19384123/