US Patent Issued to Alcon on Sept. 30 for "Contact lenses with surfaces having different softness" (Georgia Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,429,712, issued on Sept. 30, was assigned to Alcon Inc. (Fribourg, Switzerland).

"Contact lenses with surfaces having different softness" was invented by Yongxing Qiu (Suwanee, Ga.), Robert Carey Tucker (Johns Creek, Ga.) and Yeming Gu (Suwanee, Ga.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention is related to a contact lens, especially a SiHy contact lens, which comprises a lens bulk material covered with an outer surface hydrogel layer thereon and has a posterior surface and an opposite anterior surface. The outer surface hydrogel layer consists of an anterior outer hydrogel layer and a posterior outer hydrogel layer. A contact lens of t...