ALEXANDRIA, Va., June 17 -- United States Patent no. 12,310,660, issued on May 27, was assigned to Meta Platforms Technologies LLC (Menlo Park, Calif.).

"Ocular hydration sensor" was invented by Leo Baldwin (Seattle) and Mantas Zurauskas (Redmond, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatuses, methods, and systems for an ocular hydration sensor/reflectometer system in a near-eye display device are described. In one aspect, a near-eye display device may include a projector to project light onto a user's eye, a photodetector to receive reflections from the tear film of the user's eye (e.g., the tear glints), and a controller to make ocular hydration measurements from the received reflections...