Our optical eye-tracking systems are created both by the technology of head mounted display (HMD) hardware and remote type set-up. The computer analysis of various types; is suggested to obtain the characteristics of image type eye-tracking device. We use a pattern recognition computer program to distinguish the position of the pupil and calculate the coordinates of them. The system we adapt can provide the production more feasible. Comparison of computer results with the eye observation measurement data has shown very good agreement and more detail. We develop a new method to process the eye's image in the PC-base digital signal processing system. With one video CCD camera and frame grabber analyzing a series of images of human pupil during gazing the screen, an auto-range-finding algorithm is used to obtain the location of pupil in real time. The computers will provide the speech sound according to the location where the eye gaze at.

Now some patients begin to tryout this eye tracking system with the help of Veterans General Hospital and Taiwan Motor Neuron Disease Association. There are many reportages about our eye tracking system in the news media of Taiwan. The availability of multipurpose measurement of this eye tracking system with very simple equipment will be reconfirmed for the following researchers:

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