ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,880, issued on April 21, was assigned to PEGAVISION Corp. (Taoyuan City, Taiwan).
"Multifocal toric lens" was invented by Chia-Hung Lan (Taoyuan, Taiwan) and Yi-Fang Huang (Taoyuan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An intelligent multifocal lens includes an optical zone. The optical zone includes a near vision zone, a transition vision zone, and a far vision zone surrounding the near vision zone and the transition vision zone. An add power of the near vision zone has a negative correlation with a radius of the near vision zone. A reduction of the power of the transition zone is in a range of 0.1 D to 0.6 D. The near vision zone...