![]() ![]() ![]() This is the optical tracking of corneal reflections, known as pupil center corneal reflection (PCCR).Īn infrared light source (and thus detection method) is necessary as the accuracy of gaze direction measurement is dependent on a clear demarcation (and detection) of the pupil as well as the detection of corneal reflection. These reflections – the vector between the cornea and the pupil – are tracked by an infrared camera. ![]() Near-infrared light is directed towards the center of the eyes (pupil), causing detectable reflections in both the pupil and the cornea (the outer-most optical element of the eye). These measurements are carried out by an eye tracker, that records the position of the eyes and the movements they make. Eye tracking refers to the process of measuring where we look, also known as our point of gaze. ![]()
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