Hi @siera, thanks for getting in touch. tobii_gaze_origin_subscribe gives x, y and z coordinate of the gaze origin points of the
eyes of the user, as measured in millimeters from the center of the display.
whilst the tobii_eye_position_normalized_subscribe gives x, y and z coordinate of the eyes position of the user, as a normalized value within the track box (0-1).
However, the tobii_eye_position_normalized_subscribe is to be deprecated and shall not be used in future released.
Hopefully this answers your question, please let us know if you require any further information. Best wishes.