WO2025068954 - MULTIFOCAL OPHTHALMIC LENSES

National phase entry:
Publication Number WO/2025/068954
Publication Date 03.04.2025
International Application No. PCT/IB2024/059437
International Filing Date 26.09.2024
Title **
[English] MULTIFOCAL OPHTHALMIC LENSES
[French] LENTILLES OPHTALMIQUES MULTIFOCALES
Applicants **
ALCON INC.
Inventors
LU, Wei
CHOI, Myoung-Taek
XU, Zhiguang
LEE, Sangyeol
LEE, Shinwook
CARSON, Daniel R.
Priority Data
63/585,409   26.09.2023   US
63/660,654   17.06.2024   US
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Quotation for National Phase entry

Country StagesTotal
China Filing, Examination, Granting2224
EPO Filing, Examination, Granting10664
Japan Filing, Examination, Granting2307
South Korea Filing, Examination, Granting2418
USA Filing, Examination, Granting4740
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Total: 22,353

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Abstract[English] Provided in this document are examples of a multifocal ophthalmic lens. The lens includes a base lens having a base curvature corresponding to a base power; and a diffractive structure comprising a plurality of annular echelettes formed on a first surface of the base lens. The diffractive structure is configured to produce a zero-order diffraction corresponding to a distance vision focal point determined by the base power, the diffraction efficiency of the zero-order diffraction between 45% and 55%; a first-order diffraction having a diffraction efficiency between 5% and 10%; a second-order diffraction corresponding to an intermediate vision focal point, the diffraction efficiency between 15% and 20%; and a third-order diffraction corresponding to a near vision focal point, the diffraction efficiency between 15% and 25%. The diffractive structure includes a plurality of annular diffractive steps, each defined by a profile having a curved slope and a peak.[French] Ce document propose des exemples d'une lentille ophtalmique multifocale. La lentille consiste en une lentille de base possédant une courbure de base correspondant à une puissance de base ; et une structure diffractive consistant en une pluralité d'échelettes annulaires formée sur une première surface de la lentille de base. La structure diffractive est configurée pour produire une diffraction d'ordre zéro correspondant à un point focal de vision de loin déterminé par la puissance de base, l'efficacité de diffraction de la diffraction d'ordre zéro étant comprise entre 45 % et 55 % ; une diffraction de premier ordre possédant une efficacité de diffraction comprise entre 5 % et 10 % ; une diffraction de deuxième ordre correspondant à un point focal de vision intermédiaire, l'efficacité de diffraction étant comprise entre 15 % et 20 % ; et une diffraction de troisième ordre correspondant à un point focal de vision de près, l'efficacité de diffraction étant comprise entre 15 % et 25 %. La structure diffractive comprend une pluralité d'étapes de diffraction annulaires, chacune étant définie par un profil possédant une pente incurvée et un pic.