Patent ID: 8939579
Filing Date: 2015-01-27
Classification: A61B,G02C

Abstract:
1. An eye parallax tracking system, comprising: a pair of eyewear with waveguides in each eyewear lens, said waveguides being transparent so as to permit a wearer to view an external scene directly; an illumination subsystem arranged to direct a beam of collimated light onto a wearer's eyes through said waveguides; a First Purkinje point imaging subsystem for each said lens using light from said illumination system reflected from said eyes through said waveguides; and a controller operative to calculate from the positions of the First Purkinje points of the wearer's eyes a quantity representative of at least one of the wearer's gaze parallax angle and the distance to an object of interest on which the gaze of the wearer's eyes converges.