= records and digitises a user’s eye movement or point of gaze

The range of input devices extends from data gloves to special full-body suits. Head-mounted displays (HMD) can detect the point of gaze and project the appropriate image of the virtual reality (VR) environment on the display.

Tracking systems make it possible to train motor skills in virtual learning environments, and increase immersion (the user’s sense of being surrounded by the VR environment).