ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,449,675, issued on Oct. 21, was assigned to Clerio Vision Inc. (Rochester, N.Y.).

"Subsurface optical structure with enhanced distribution of refractive index values" was invented by Lisen J. Xu (Pittsford, N.Y.) and Gustavo A. Gandara-Montano (Rochester, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Ophthalmic lenses and related methods employ subsurface optical structures with enhanced refractive index distributions. An ophthalmic lens includes a lens body and a subsurface optical structure within the lens body. Sub-volumes of the optical structure have refractive indexes that vary spatially between a first limit refractive index for the optical...