The Eyegaze Communication System, Detailed Medical and Technical Information, LC Technologies, Inc.
Nothing is attached to the user.
Eyegaze users range in age from 5 years to 80 years old. An infrared-sensitive video camera, mounted beneath the System's monitor, takes 60 pictures per second of the user's eye. The LED reflects a small bit of light off the surface of the eye's cornea. The light also shines through the pupil and reflects off of the retina, the back surface of the eye, and causes the pupil to appear white. The bright-pupil effect enhances the camera's image of the pupil and makes it easier for the image processing functions to locate the center of the pupil.