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.
