One of the basics seen in the demo version of Windows 8 shows that it can be used with touch screens. If we add to it the eye controlled function, things get Sci-Fi.
The system was invented by people from Tobi and it’s called Tobii Gaze Interface. It works by sending the user’s eyes light near-infrared region. Then, it uses two infrared cameras to capture what is reflected on the retina and cornea. With this data, it builds a 3D model of the eye. So, the system knows where the user looks, but does nothing until it has the green light. Even though it may seem difficult to use, the system is simple and fast.