ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,396,842, issued on Aug. 26, was assigned to Alcon Inc. (Fribourg, Switzerland).

"Ophthalmic lenses having an extended depth of focus for improving intermediate vision" was invented by Myoung-Taek Choi (Arlington, Texas), Sangyeol Lee (North Richland Hills, Texas), Shinwook Lee (Arlington, Texas) and Wangkuen Lee (Arlington, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides an ophthalmic lens (such as an IOL) that is designed to enhance depth of focus for intermediate vision performance, while maintaining distance vision. The lens may include an optic having an anterior surface and a posterior surface disposed about an ...