MULTIFOCAL LENS HAVING REDUCED VISUAL DISTURBANCES

Title:

MULTIFOCAL LENS HAVING REDUCED VISUAL DISTURBANCES

Document Type and Number:

Japanese Patent JP2023165744

Kind Code:

A

Abstract:

To provide a multifocal lens having reduced visual disturbances.SOLUTION: A method and system provide an ophthalmic device. The ophthalmic device includes an ophthalmic lens (110) having an anterior surface (112), a posterior surface (114), at least one diffractive structure (120) and at least one base curvature (130). The at least one diffractive structure provides a first spherical aberration for a first focus corresponding to at least a first focal length. The at least one base curvature provides a second spherical aberration for at least a second focus corresponding to at least a second focal length. The first spherical aberration and the second spherical aberration are provided such that the first focus has a first focus spherical aberration and such that the second focus has a second focus spherical aberration. The first focus spherical aberration is opposite in sign to the second focus spherical aberration.SELECTED DRAWING: Figure 2

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Inventors:

CHOI MYOUNG-TAEK
LIU YUEAI
HONG XIN

Application Number:

JP2023144275A

Publication Date:

November 17, 2023

Filing Date:

September 06, 2023

Export Citation:

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Assignee:

ALCON RES LTD

International Classes:

A61F2/16; G02C7/04

Attorney, Agent or Firm:

Atsushi Aoki
Shinji Mihashi
Junichi Tsuruta
Tomohiro Minamiyama
Youichi Watanabe

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