ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,924, issued on July 21, was assigned to Apple Inc. (Cupertino, Calif.).

"Biofeedback method of modulating digital content to invoke greater pupil radius response" was invented by Sterling R Crispin (Santa Cruz, Calif.), Izzet B Yildiz (Sunnyvale, Calif.) and Grant H Mulliken (Los Gatos, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "One exemplary implementation displays a visual characteristic associated with an object on a display of a device and utilizes a sensor of the device to obtain physiological data associated with a pupillary response of a user to the visual characteristic. The device adjusts the visual characteristic based on the ob...