Eye tracking is the process of measuring the perspective and the movement of the eye relative to the head. An eye tracker device is a device for measuring eye positions and eye movement. Eye tracking is used in the visual system, visual system research, psychology, psycholinguistics, marketing, human-computer interaction and product design. Eye tracking technology has become more common in recent years. In the coming years, this technology is expected to be integrated into computer and mobile operating systems. The development of technology takes place with USB devices, smart glass, smart glasses, lenses, virtual reality devices.