Eye tracking is the process of watching where a person is looking. We do this all the time – it’s a natural part of human behavior. With the advent of small, highly accurate and low-cost systems, eye tracking is now being rapidly adopted in devices and applications to enhance computer interaction.
An eye tracker is a device that incorporates illumination, sensors and processing to track eye movements and gaze point. The use of near-infrared light allows for accurate, continuous tracking regardless of surrounding light conditions.
Eye-tracking technology enables us to use our gaze to interact with computers and machines. Eye gaze provides a very efficient method of pointing, and in combination with other input one can create highly efficient and amazingly natural interactions.