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1. (WO2018197974) MULTIFOCAL OPHTHALMIC LENS HAVING CHROMATIC ABERRATION CORRECTION

Pub. No.:    WO/2018/197974    International Application No.:    PCT/IB2018/052385
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Fri Apr 06 01:59:59 CEST 2018
IPC: G02C 7/04
A61F 2/16
G02C 7/06
Applicants: NOVARTIS AG
Inventors: WEI, Xin
HONG, Xin
Title: MULTIFOCAL OPHTHALMIC LENS HAVING CHROMATIC ABERRATION CORRECTION
Abstract:
An ophthalmic lens includes an optic comprising an anterior surface, a posterior surface, and an optical axis. At least one of the anterior surface and the posterior surface has a surface profile including a base curvature, a refractive region having the base curvature, and a diffractive region comprising a diffractive profile including a plurality of diffractive steps. At least a portion of the diffractive profile constitutes a combination of a base diffractive profile defining multiple foci for the ophthalmic lens and an achromatizing structure that reduces longitudinal chromatic aberrations.