Gaze tracking method, apparatus, device, and medium

A gaze tracking apparatus, applied to a head-mounted device, wherein the head-mounted device comprises a display screen and a camera, and the apparatus comprises:

• an extracting module, configured to extract a plurality of feature points according to a target content displayed on the display screen, and determine first position information of the plurality of the feature points on the display screen;
• an acquiring module, configured to acquire a user's eye image captured by the camera, wherein the eye image comprises a reflection image of the target content displayed on the display screen on an ocular cornea;
• a determining module, configured to determine a plurality of mapping points corresponding to the plurality of feature points in the eye image, and determine second position information of the plurality of the mapping points in the eye image;
• and
• a tracking module, configured to determine a position and an orientation of an eyeball according to the first position information and the second position information.