Method of interaction by gaze and associated device

A gaze interaction system between one or more users and a real environment in which they are moving, the system including:

• a. a portable gaze tracking device identifiable by a visual marker, carried by each user, the portable gaze tracking device including a transmitter and a marker, the marker forming a visual identification pattern;
• b. at least one electronic device, the at least one electronic device includes:
• a receiver of a piece of information sent by the transmitter,
• the received piece of information providing information on the direction of the user's gaze in a plane of reference of the gaze tracking device,
• at least one camera for acquiring an image of the marker, the camera being separate from the gaze tracking device,
• a memory storing a digital representation of the environment in a plane of reference specific to the environment,
• a processor configured so as, based on the piece of information received by the receiver, the image of the marker acquired by the at least one camera, and the digital representation stored in the memory, to determine, in real-time, the direction of the user's gaze relative to the environment and/or the zone of the environment gazed at by the user,
• the environment being an enclosed space.