First Eye-Tracking Head Mount Display
From: Wireless Design & Development - 08/04/2014

Tokyo-based startup Fove has developed a head mounted display with
eye-tracking technology. Featuring a variety of sensors, including a
high-refresh gyroscope, accelerometer, and magnetometer sensor, this device
allows users to control things with their gaze. According to Fove, the
display adjusts focus of a scene by determining where in the 3D space the
user is looking through tracking their gaze and parallax, making it ideal for
gaming, amusement park, and medical applications.

Source: (with video)
http://www.wirelessdesignmag.com/videos/2014/08/first-eye-tracking-head-mount-display

Link:
Fove
http://fove-inc.com/