Patent ID: 9713423
Date: 2017-07-25
CPC Classifications: A61B,G02B

Claim:
1. An apparatus for detecting fixation in at least one eye of a subject on a target comprising: a) an optical illumination system capable of scanning at least a portion of a retina of an eye of a subject with an illuminating beam of light, wherein the illuminating beam of light is polarized such that reflected portions of the illuminating beam are affected by birefringence of substructures of the retina, and wherein said optical illumination system further comprises a polarization modulating assembly configured to modulate the polarization of said illuminating beam; b) an optical detection system capable of detecting at least a portion of the illuminating beam of light of a) after being reflected back from the retina to provide a detection signal; c) a signal processing system adapted to communicate with the optical detection system to receive the detection signal; d) a signal analysis system adapted to communicate with the signal processing system to analyze the detection signal;