Method and system for guiding a user in calibrating an eye tracking device

An eye tracking system comprising a wearable eye tracking device, a remote display device, processing circuitry and a memory containing instructions executable by said processing circuitry, wherein the eye tracking device comprises a scene camera and an eye tracking camera, wherein the processing circuitry is configured to:

• determine a calibration point in a first fixed coordinate system associated with the scene camera;
• determine an initial gaze point of a user wearing the eye tracking device using the eye tracking camera and the scene camera, the initial gaze point being determined in the first fixed coordinate system, and being determined in a second fixed coordinate system associated with the remote display device when the second fixed coordinate system overlaps with the first fixed coordinate system;
• calculate a first direction and a first distance from the initial gaze point to the calibration point in the first fixed coordinate system;
• cause the remote display device to display a calibration marker at the initial gaze point, wherein the calibration marker is configured to indicate the first direction;
• in response to a movement of the gaze point in relation to the calibration point caused by movement of the user's head while wearing the eye tracking device and/or movement of the remote display device:
• determine a current gaze point in the fixed coordinate system;
• calculate a second direction and a second distance from the current gaze point to the calibration point in the first fixed coordinate system;
• and
• cause the remote display device to update the calibration marker in accordance with the second direction and/or second distance.