ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,143, issued on March 25, was assigned to Hoya Medical Singapore Pte. Ltd. (Singapore).
"Intraocular lens" was invented by Demas Sanger (Fukaya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are an intraocular lens and a technique associated therewith, wherein an average value (exceeding 0 D) of base difference values within a first region from a lens center O to a position r1 of a first boundary is greater than 5 times an average value (exceeding 0 D) of base difference values within the first region from a lens center O of a virtual spherical lens having a base power at the lens center O to the position r1, a second region has a po...