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US 2021/0228335 A1Published application
Multifocal ophthalmic lens having chromatic aberration correction
AssigneeAlcon Inc.
InventorsXin Hong, Xin Wei
Life of this patent
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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.
Claims15
An ophthalmic lens, comprising
- an optic comprising an anterior surface, a posterior surface, and an optical axis, at least one of the anterior surface and the posterior surface having a surface profile including:
- a base curvature;
- a refractive region having the base curvature;
- a diffractive region comprising a diffractive profile comprising plurality of diffractive steps, at least a portion of the diffractive profile being a combination of:
- a base diffractive profile defining multiple foci for the ophthalmic lens;
- and
- an achromatizing structure that reduces longitudinal chromatic aberrations.
4 more elements
Dependencies are inferred from the claim text.