SMI Eye Tracking Glasses is a device designed to analyze visual perception in a real and virtual environment (for example driving simulators). The device uses a non-contact optical method, which consists in examining the position of the infrared light reflection from the eye’s cornea in relation to the center of the pupil. The Glasses system is built on the basis of glasses. It also has automatic parallax error compensation which ensures highly accurate results at any distance (no manual adjustment necessary). SMI glasses have the option of replacing corrective lenses, and therefore can be used to examine people with visual impairments. The system operates in binocular mode, i.e. both eyes are monitored simultaneously.

The eye tracking device allows you to test the user’s visual activity. The parameters most often measured in the study of visual activity are the so-called fixations and saccades. Fixation means holding the test person eyesight on an element or area. This process should last more than 200 ms. It is assumed that fixations are associated with prioritizing elements in terms of the field of view, as well as with their cognitive analysis. A saccade is a shift of eyesight from one fixation to the next. This is one of the fastest eye movements, lasting 30 ms to 80 ms. During this movement, the human does not register the elements in its path, but only changes the analysis area from the area at the start point to the area at the end point. The path of a saccade is rarely the shortest path between the start and end points. It usually takes the shape of a curve.