ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,694, issued on Jan. 27, was assigned to VSY BIYOTEKNOLOJI VE ILA SAN. A.S. (Istanbul).
"Ophthalmic multifocal lenses" was invented by Sven Thage Sigvard Holmstrom (Istanbul).
According to the abstract* released by the U.S. Patent & Trademark Office: "A new generation ophthalmic multifocal lenses and a method of manufacturing same. The lenses at least provide focal points for near, intermediate and far vision. The lens body provides a refractive focal point for intermediate vision. The lens body comprises a diffraction grating operating as an optical wave splitter, providing a diffractive focal point for near vision and a diffractive focal point for far vision. The lens body compr...