Various Eyetracking techniques

• Mechanical:
• Con: A sensor has to be applied to the surface of the eye.
• Electroencephalogram:
• Con: Inaccurate method; the system has to be recalibrated frequently.
• Optical scanning:
• Con: Requires a lot of computing power and thus causes high costs.
• Pro: The position can be calculated quickly; the user keeps all freedom of movement.

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