US 12,736,834 B2Granted

Lens element

AssigneeEssilor International

InventorMatthieu Guillot

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Abstract

Method for determining a lens element intended to be mounted on a spectacle frame and to be worn in front of an eye of a wearer, the lens element comprising; —a refraction area having a refractive power based on prescribed refractive power Px for said eye of the wearer, the refraction area comprising at least a central zone, —a plurality of optical elements having an optical function of not focusing an image on the retina of the eye of the wearer, wherein the method comprises: —obtaining frame data representing the spectacle frame on which the lens element is intended to be mounted; —obtaining wearer's data representing at least one parameter of the face of the wearer, —determining fitting data representing the spectacles positioned on the face of the wearer based on the frame data and the wearer's data; and —optimizing at least one parameter of the optical elements based on the fitting data.

Claims13

Dependent claims

A computer-implemented method for determining a lens element to be mounted on a spectacle frame and to be worn in front of an eye of a wearer, the lens element including a refraction area having a refractive power based on prescribed refractive power Px for said eye of the wearer, the refraction area having at least a central zone, a plurality of optical elements having an optical function of not focusing an image on a retina of the eye of the wearer, the method comprising:

obtaining frame data representing the spectacle frame on which the lens element is to be mounted;
obtaining wearer's data representing at least one parameter of a face of the wearer;
determining fitting data representing spectacles positioned on the face of the wearer based on the frame data and the wearer's data;
determining, based on the fitting data, at least one of a temporo-nasal ratio quantifying the ratio between a dimension of a nasal side of the lens element and a dimension of an opposite temporal side of the lens element and an upper-lower ratio quantifying the ratio between a dimension of an upper part of the lens element and a dimension of an opposite lower part of the lens element, and
optimizing at least one parameter of the optical elements based on the fitting data and the determined temporo-nasal ratio and/or upper-lower ratio.

2 more elements

A lens element to be mounted on a spectacle frame and to be worn in front of an eye of a wearer, the lens element comprising:

a refraction area having a refractive power based on a prescribed refractive power Px for said eye of the wearer and comprising at least a central zone;
and
a plurality of optical elements having an optical function of not focusing an image on a retina of the eye of the wearer,
wherein the lens element comprises a reference point defining a nasal side and temporal side of the lens element and/or an upper side and a lower side of the lens element, said reference point being a fitting point that faces the center of the eye of the wearer looking straight ahead when the lens element is worn in standard wearing conditions,
wherein the optical elements are arranged based at least on the prescribed refractive power Px and a shape of the spectacle frame so that the density of optical elements in the nasal side and the density of optical elements in the temporal side are different and the ratio of density of optical elements in the nasal side and the temporal side of the lens element is comprised between 0.5 and 2 times, and/or
the density of optical elements in the upper side and the density of optical elements in the lower side are different, and the ratio of density of optical elements in the upper side and the lower side is comprised between 0.5 and 2 times.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/293,116Filed 1 Aug 2022
Priority: EP 2130607630 Jul 2021
Published: US 2024/0329429 A13 Oct 2024
Granted: 15 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G02C 7/066
Shape of the progressive surface: shape, location or size of the viewing zones
G02C 7/027
Methods of designing ophthalmic lenses: considering wearer's parameters
G02C 2202/24
Generic optical aspects applicable to one or more of the subgroups of G02C7/00: myopia progression prevention
G02C
Spectacles