Patent ID: 8342687

Claim:
A method of determining a gaze point of an eye watching a visual display controllable by a display signal, the method comprising: generating a display signal using a graphics card in order for the visual display to produce a screen pattern; receiving a signal encoding an image of the eye including a corneo-scleral reflection of the screen pattern; and determining, based on in part the geometry of said corneo-scleral reflection of the screen pattern, a gaze point of the eye, wherein said determining a gaze point includes utilizing the graphics card as a parallel processor, wherein the graphics card receives, directly from the imaging device, the signal encoding an image of the eye including a corneo-scleral reflection of the screen pattern, and wherein said determining a gaze point comprises: extracting, using the graphics card, one or more image features in said corneo-scleral reflection of the screen pattern; and comparing, using the graphics card, said one or more image features with the display signal in order to retrieve these in the screen pattern.