Headtracking and eyegaze
Headtracking and eyegaze are methods of interacting with a computer by moving your head or eyes.
Headtracking is appropriate technology for individuals with any disability where the user lacks the hand control to use a standard mouse but retains good head movement. Head movements are tracked allowing users to interact with computers in a variety of ways.
For users with limited head movements eyegaze technology allows people to interact with computers by pointing with their eyes.
How do they work?
A video camera observes the user's eye and specialized image processing software analyzes the video images of the eye and determines the eye's gazepoint on the monitor screen.
Simply by looking at control keys displayed on a computer screen a disabled user can type, generate synthesized speech, control lights and appliances, operate a telephone, play games, and run compatible software.
Useful links
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COGAIN is a network of excellence on Communication by Gaze Interaction, supported by the European Commission's IST 6th framework program.
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Access interventions page of the Don Johnston special needs web site.