UEYS is a type of interactive technology that uses eye tracking technology to enable user input. It works by tracking the eyes of a user and using this as an input device. The technology is mainly used in video games, virtual reality, and simulation applications. It has a variety of uses in these fields, from providing a more immersive experience to being used as an input device for certain applications.

UEYS can be used to give players more control in a game. With eye tracking, players can more easily aim in shooter games and move more accurately in virtual reality games.