ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,562,003, issued on Feb. 24, was assigned to Apple Inc. (Cupertino, Calif.).

"Pupil assessment using modulated on-axis illumination" was invented by Walter Nistico (Redwood City, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Various implementations determine a pupil characteristic (e.g., perimeter location, pupil shape, pupil diameter, pupil center, etc.) using on-axis illumination. On-axis illumination involves producing light from a light source that is approximately on-axis with an image sensor configured to capture reflections of the light from the light source off the eye. The light from the light source may passes through the pupil into the...