3 Different ways of system control
3.3 System control via eyes tracking

The systems for eye tracking evaluate position of gaze point based on pupil position. They use the video signals from cameras to track the pupil position. The video signals are processed by central unit, where the position of the pupil is evaluated, and user gaze position is estimated. To transform the recognised pupil position into gaze position an eye model for particular user is maintained. The parameters of the eye model are estimated during the calibration process.