A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
88/121.5
A61B 3/02 (2006.01) A61B 3/113 (2006.01)
Patent
CA 1272901
ABSTRACT OF THE DISCLOSURE The invention relates to a device for measuring eye movements. At least two radiation sources are located in front of the eyes and at least two radiation detectors are adapted to detect the radiation reflected from the eye, whereby the detectors are located in connection with the radiation sources, The radiations sources and the detectors are disposed in pairs so that one pair is arranged on each side of at least one symmetry plane through the centered eye. The at least two pairs are disposed on a diaphragm which is located at a certain distance from the eye and which is provided with an aperture straight opposite to the eye having a certain form and size thereby to permit the eye to look through the aperture within a certain space angle. Electronic means are arranged to detect the radiation which is reflected from the eye and incident against the detector to adjust the radiation from the sources in such a way that the radiation intensity detected by each detector will be substantially equal. The difference in the emitted radiation intensity between the two radiation sources is a rough measure of the light reflection from the eye and thus a coarse measurement of the instantaneous position of the eye which together with a fine measurement of the photodetector output forms a high resolution measurement of the eye position.
495553
Ober Jan K.
Udden Per
Gowling Lafleur Henderson Llp
Ober Jan K.
Udden Per
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