US Patent Issued to Alcon on April 29 for "Intraocular lenses having zone-by-zone step height control" (Texas Inventors)

ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,329, issued on April 29, was assigned to Alcon Inc. (Fribourg, Switzerland).

"Intraocular lenses having zone-by-zone step height control" was invented by Xin Hong (Fort Worth, Texas) and Shinwook Lee (Arlington, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and system provide an ophthalmic device. The ophthalmic device includes an ophthalmic lens having anterior surface, a posterior surface and at least one diffractive structure including a plurality of zones. The at least one diffractive structure is for at least one of the anterior surface and the posterior surface. Each zone includes at least one echelette having a least one step h...