MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202617075403 A) filed by Essilor International on June 18, 2026, for Chromatic Optimizartion Of Phase-Shift Designs For Myopia Control.
Inventors include Hamlaoui, Samy; Mercier, Sylvain; Fermigier, Bruno Number; Guillot, Matthieu; Cavallazzi, Mathieu; and Gacoin, Eric.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
Abstract: An optical lens intended to be worn in front of an eye of a wearer to correct a vision impairment and to slow down the progression of said vision impairment, the optical lens comprising a pattern of microstructures, wherein over a pupil area having a diameter equal to or greater than 4.0 mm and including at least part of the microstructures, the optical lens produces a first optical path difference map (OPD1), wherein over said pupil area, the pattern of microstructures produces constant phase shifting so that the differential optical path map (DOP), being the difference between said first optical path difference map (OPD1) and a second smooth optical path difference map (OPD2), is a piecewise constant of at least two levels, characterized in that over said pupil area, an image quality (Q1) measured at a first wavelength (?1) is at least 10% lower than a retinal image quality (Q2) measured at a second wavelength (?2).
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