Essilor International

Essilor International (compagnie Generale D'optique)

Carlos Rego

Matthieu Guillot

Eric Gacoin

Jérôme Moine

Bruno Amir

Guillaume Broutin

Olivier Roussel

Helene Guillou

Cyril Guilloux

Thierry Bonnin

Laurent Calixte

Ludovic Jouard

Loic Quere

Fabien Muradore

Pauline Colas

Melanie Heslouis

Loïc Quere

Helene De Rossi

Cédric Begon

Cedric Begon

Hélène De Rossi

Melanie Tessieres

Céline Benoit

Berangere Granger

Christophe Jeannin

Mélanie Tessieres

Bérangère Granger

Maxime Boiffier

Paul Joret

Mélanie Heslouis

Melanie Tessiere

Hélène Guillou

A method implemented by a computer for determining a single vision ophthalmic lens that is adapted to a wearer, the method including a wearer prescription data providing step during which wearer prescription data indicative at least of the prescribed optical power of the wearer are provided, a wearing data providing step during which wearing data indicative of the wearing parameters of the single vision ophthalmic lens by the wearer are provided, a single vision ophthalmic lens determining step during which the single vision ophthalmic lens is determined so that in wearing conditions corresponding to the wearing parameters, the single vision ophthalmic lens provides to the wearer the prescribed optical power in at least a first gazing direction when gazing at a first distance and second gazing direction when gazing at a second distance, wherein the first and second distances are different and the first and second gazing directions are different.

Method for determining a single vision ophthalmic lens

A method implemented by computer for processing an unfinished optical lens member for manufacturing an optical lens, the unfinished optical lens member having an unfinished surface and an aspherical finished surface having a first reference system with a first reference point, and the optical lens to be manufactured including first and second surfaces, the first surface including a second reference system with a second reference point and included in the aspherical finished surface of the lens member, the method including: providing an unfinished optical lens member data; providing an optical function; providing a reference point position; providing an optical lens parameter; determining a reference system; determining a first surface dataset; and determining a second surface dataset.

Method for processing an unfinished optical lens member

A set of ophthalmic lenses is described where each ophthalmic lens has at a point of optical reference a maximum power and meets an optical performance criterion in standard wearing conditions, wherein the range of maximum powers of the set of ophthalmic lenses is greater than or equal to 10 D, and all the ophthalmic lenses of the set of ophthalmic lenses have been manufactured from a set of semi-finished lens blank, each semi-finished lens blank having the same base curve.

Set of ophthalmic lenses

A lens element adapted for a person including a holder including a refraction area having a refractive power based on a prescription for correcting an abnormal refraction of the person, a plurality of optical elements placed on at least one surface of the holder to at least one of: slow down, retard, or prevent a progress of the abnormal refraction of an eye of the person, and at least one layer of at least one coating element covering at least a zone of at least one optical element and at least a zone of the holder on which the optical elements are placed, wherein said at least one layer of at least one coating element adds an optical power of 0.1 diopter in absolute value in specific wearing conditions when measured over said zone of the optical element covered by said at least one layer of at least one coating element.

Optical lens

Method implemented by computer for determining an optical equipment including at least an optical lens and a spectacle frame, the lens being adapted to be mounted in the frame, the method including:

Method for determining an optical equipment

Method means for optimizing an optical lens adapted to a wearer, using an initial optical system providing stage (S), during which an initial optical system is provided. The initial optical system has at least a light source (), a light receiver () and an initial optical lens (L) placed between the source () and the receiver (), the initial optical lens a Fresnel zone, a working optical lens defining stage (S), for evaluating a working optical lens is defined to be equal to the initial optical lens (L), an evaluation stage (S), during which a cost function related to the number of light rays received by the light receiver () that have passed through the annular step of the working optical lens, a modifying stage (S), for modifying the annular step of the working optical lens, wherein the evaluation and modifying steps are repeated to minimize the cost function.

Method for optimizing a Fresnel optical lens

Method for determining a surface of a face of an optical lens to be mounted to a spectacle frame, the method comprising: a contour data providing step (S), during which contour data representing a contour of the spectacle frame is provided, a target curvature data providing step (S) during which target curvature data representing the target curvature of the surface to be determined over an evaluation zone of said surface is provided, an optical surface determining step (S), during which a surface is determined so as to minimize: the difference between the target curvature and average curvature of the surface over the evaluation zone, and the difference between the contour of the spectacle frame and the periphery contour of the surface, the periphery contour of the surface corresponding to the contour of the surface to be determined of the optical lens after the optical lens has been edged to be mounted in the spectacle frame.

Method for determining a surface of an optical lens adapted to a spectacle frame

The disclosed embodiments include a method for determining a geometric definition of a piece of personalized optical equipment adapted to its wearer, comprising at least one geometric definition of a personalized frame of this piece of personalized equipment. In one embodiment, the geometric definition of said personalized frame is determined depending on at least one geometric parameter of personalization of the frame and on a reference frame chosen by the wearer. Further, the value of said at least one geometric parameter of personalization of the frame being determined on the basis of the acquisition of data relating to at least one morphological quantity of the head of the wearer, in such a way that the personalized frame is adjusted to conform with a least one criterion of adjustment of personalization of the geometry of the frame with respect to the morphological quantity of the head of the wearer.

Method for determining a geometric definition of a customized optical device

A method for designing a mould () for casting a semi-finished ophthalmic lens blank, wherein the surface of the mould () is designed so that the surface of the mould fits a predetermined closed curve, wherein the predetermined closed curve is representative of the geometry of a gasket () to be used in association with the mould (). A method for assembling a mould assembly () and a method for casting a semi-finished ophthalmic lens blank, and a computer program product including software code portions for performing steps of these methods are also described.

Method for designing a mould for casting a semi-finished ophthalmic lens blank and computer program product for carrying out said method

A method for determining a progressive ophthalmic lens, comprising determining first, second and third intermediate values of regression as the strongest regression that can be applied on the front surface of the lens while keeping a mean sphere value in at least a portion of the lower part of the rear surface of the lens less or equal to, respectively, first, second and third predetermined values; and determining a value of regression (d) for the front surface as the maximum value among the first, second and third intermediate values of regression.

Method for determining a progressive opthalmic lens and a set of semi finished lens blanks

Methods for determining a progressive ophthalmic lens are described, the lens comprising a near and a far vision area, a main meridian separating the lens into a nasal and a temporal area. The method includes determining a first and a second surface of the lens, determining the second surface to provide, in combination with the first surface, vision correcting properties, and determining a spherical area on the first surface of the lens having a constant sphere value and including a far vision diopter measurement position. The far vision diopter measurement position and a near vision diopter measurement position have substantially the same mean sphere value. The method also includes determining the first surface to reduce the lens distortion by defining a toric area extending outside the spherical area on the first surface in at least one of the nasal and the temporal area, in which characteristics of the toric area are related to the lens astigmatism.

Methods for determining a progressive ophthalmic lens

Disclosed is a progressive ophthalmic lens including a front surface and a rear surface, each surface having in each point an altitude, a mean sphere value and a cylinder value, the front surface of the lens including: &#x2014;a far vision zone having a far vision reference point; &#x2014;a near vision zone having a near vision reference point; &#x2014;a main meridian, wherein the front surface is regressive and has: &#x2014;a sphere gradient normalized value of less than 7.50&#xb7;10mmat any point in a central portion of the lens including a portion of the main meridian (), the far vision reference point (FV) and the near vision reference point (NV); &#x2014;a cylinder gradient normalized value of less than 1.45 mmat any point in the central portion of the lens.

Growing community of inventors

Charenton-le-Pont, France

Carlos Rego