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Eye tracking system with single point calibration

  • US 10,115,205 B2
  • Filed: 03/10/2017
  • Issued: 10/30/2018
  • Est. Priority Date: 03/11/2016
  • Status: Active Grant
First Claim
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1. A method comprising:

  • obtaining cornea information for an eye of a user, the cornea information including a radius of a corneal sphere of the eye and location of a center of the corneal sphere;

    capturing one or more reflections of a pupil of the eye of the user while the user is viewing content displayed on a head-mounted display (HMD);

    determining a shape of the pupil based on the one or more captured pupil reflections;

    identifying a three-dimensional plane parallel to the pupil, the three-dimensional plane identified based on the obtained cornea information and the identified pupil shape;

    identifying a ray originating from the three-dimensional plane and perpendicular to a surface of the corneal sphere;

    determining a pupillary axis for the pupil of the user based on the identified ray; and

    performing an optical action based in part on the determined pupillary axis.

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