Photodetectors (18, 19) and light beam sources (10) are arranged near the field-of-regard (30) such that beams (12) are reflected from the viewer's eyes back to the photodetectors. For each beam, the beam direction and a line between its source and a photodetector where its reflected signal is maximized...http://www.google.es/patents/US5406074?utm_source=gb-gplus-sharePatente US5406074 - Noninvasive, remote eye position and orientation measurement system using light beams normal to the surface of the eye
Noninvasive, remote eye position and orientation measurement system using ...
