US Patent Issued on March 24 for "Methods and devices for refractive corrections of presbyopia" (California Inventor)

ALEXANDRIA, Va., March 24 -- United States Patent no. 12,582,515, issued on March 24.

"Methods and devices for refractive corrections of presbyopia" was invented by Junzhong Liang (Fremont, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods for treating presbyopia in a patient's eye involve inducing spherical aberration in a central area of the pupil. In embodiments, refractive properties of an eye are measured to obtain a baseline refractive correction. A lens for wearing on the eye is provided to create spherical aberration or a distribution of spherical aberrations beyond the baseline refractive correction in the central area of the pupil. The central area of the pupil has a diameter of between...