Essilor International

Sebastien Fricker

Benjamin Rousseau

Melanie Heslouis

Cyril Guilloux

Thierry Bonnin

Isabelle Poulain

Guilhem Escalier

Nacer Lakhchaf

Juliette Wierzbicki

Valerie Jolivet

Matthieu Guillot

Gilles Le Saux

Jean-Pierre Chauveau

Fabien Muradore

Pauline Colas

Sebastien Maurice

Berangere Granger

Asma Lakhoua

Pierre Bercher

The invention relates to a method for determining at least an optical feature of an ophthalmic lens to be placed in a frame for vision correction of a subject, comprising: a) measuring () a value of a fitting parameter linked to the subject and/or the frame or a value of a dioptric parameter of the subject, thanks to a measurement process, b) providing () a level of uncertainty of said value measured in step a) depending on said measurement process, c) determining () said optical feature of said ophthalmic lens by taking into account said value measured in step a) and said level of uncertainty provided in step b).

Method and device for determining at least an optical feature of a progressive lens to be placed in a frame for vision correction of a subject

A method for determining a postural and visual behavior of a person, the method comprising:&#x2014;a person image receiving step during which a plurality of images of the person are received,&#x2014;a context determining step during which the plurality of images of the person are analyzed so as to determine context data representative of the context in which the person is on each image of the plurality of images,&#x2014;an analyzing step during which the plurality of images of the person are analyzed so as to determine at least one oculomotor parameter of the person,&#x2014;a postural and visual behavior determining step during which a postural and visual behavior of the person is determined based at least on the at least one oculomotor parameter and the context data.

Method for determining a postural and visual behavior of a person

A method for evaluating an ophthalmic lens for a given wearer according to a visual performance parameter includes providing wearer's data for the given wearer. The method further includes providing a visual performance parameter tolerance range for the wearer. The method further includes providing an ophthalmic lens to be evaluated, the ophthalmic lens being characterized by opto-geometrical features. The method further includes computing a value of the visual performance parameter for the lens to be evaluated on the basis of a model. The method further includes evaluating the ophthalmic lens by comparing the computed value of the visual performance parameter with the visual performance parameter tolerance range.

Method for evaluating an ophthalmic lens; associated evaluation system and industrial assembly for manufacturing an ophthalmic lens

A method is provided for providing a selection chart of non-prescription ophthalmic lenses. The method comprises providing at least one optical performance parameter threshold (OPPT) associated to an optical performance parameter (OPP); choosing the selection criterion (SC) among the selection criteria of the list consisting of: lens base curve; lens pantoscopic angle; and lens wrap angle; choosing a selection criterion range (SCR) for each of the chosen selection criterion; calculating selection domains (SD) defined by sub-ranges for each of the chosen SC within the SCR so as to determine and associate in each SD a single non-prescription ophthalmic lens with a spherical front surface, a complex back surface and a lens base curve. All the chosen OPPs are equal or less to the OPPT for all values of the SC within the SD associated to the single non-prescription ophthalmic lens.

Method for providing a selection chart of nonprescription ophthalmic lenses

An ophthalmic progressive addition lens for a farsighted and presbyopic wearer having a mean refractive power, PPO(&#x3b1;, &#x3b2;), a module of resulting astigmatism, ASR(&#x3b1;, &#x3b2;), an acuity loss value ACU(&#x3b1;, &#x3b2;), wherein the (&#x3b1;, &#x3b2;) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion1&#x2265;44 D.deg, and wherein: AcuityCriterion1 is defined as a combination of PPO(&#x3b1;, &#x3b2;), ASR(&#x3b1;, &#x3b2;), ADD, and ACU(&#x3b1;, &#x3b2;).

Ophthalmic progressive addition lens for a farsighted and presbyopic wearer; method for providing such a lens

A method for determining a three dimensional performance of an ophthalmic lens including: calculating a domain in which a condition between a local optical criterion and at a threshold value is fulfilled; determining the three dimensional performance of the ophthalmic lens according to the domain. A method of calculating an ophthalmic lens includes the method.

Method for determining a three dimensional performance of an ophthalmic lens; associated method of calculating an ophthalmic lens

An ophthalmic progressive addition lens for a myopic and presbyopic wearer having a mean refractive power, PPO(&#x3b1;, &#x3b2;), a module of resulting astigmatism, ASR(&#x3b1;, &#x3b2;), an acuity loss value ACU(&#x3b1;, &#x3b2;), wherein the (&#x3b1;, &#x3b2;) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion1&#x2265;1340 D&#xb7;deg, and wherein: AcuityCriterion1 is defined as a combination of PPO(&#x3b1;, &#x3b2;), ASR(&#x3b1;, &#x3b2;), ADDp, and ACU(&#x3b1;, &#x3b2;).

Ophthalmic progressive addition lens for a myopic and presbyopic wearer and method for providing same

An ophthalmic progressive addition lens for an emmetropic and presbyopic wearer having a mean refractive power, PPO(&#x3b1;, &#x3b2;), a module of resulting astigmatism, ASR(&#x3b1;, &#x3b2;), an acuity loss value ACU(&#x3b1;, &#x3b2;), wherein the (&#x3b1;, &#x3b2;) functions are determined in as-worn conditions of the lens by the wearer, and a first acuity criterion, AcuityCriterion1 which fulfils following requirement: AcuityCriterion1&#x2265;435 D.deg, and wherein: AcuityCriterion1 is defined as a combination of PPO(&#x3b1;, &#x3b2;), ASR(&#x3b1;, &#x3b2;), ADD, and ACU(&#x3b1;, &#x3b2;).

Ophthalmic progressive addition lens for an emmetropic and presbyopic wearer and method of providing same

An ophthalmic progressive addition lens for a presbyopic wearer which has a prescribed far vision mean refractive power a non nil prescribed addition, ADD, the lens having a far vision reference point, a mean refractive power, PPO(&#x3b1;, &#x3b2;), a module of resulting astigmatism, ASR(&#x3b1;, &#x3b2;), a meridian line, ML(&#x3b1;, &#x3b2;), the (&#x3b1;, &#x3b2;) functions being determined in as-worn conditions of the lens by the wearer for gaze directions (&#x3b1;, &#x3b2;) joining the center of rotation of the eye, CRE, and the lens, wherein &#x3b1; is a lowering angle in degree and &#x3b2; is an azimuth angle in degree, and wherein &#x3b1; lens criterion, CRIT, fulfils following requirement: 0.38&#x2264;CRIT&#x2264;4.50, where: CRIT=NumeratorCRIT/DenominatorCRIT, NumeratorCRIT=(A1/A2)+(PPO(&#x3b1;, &#x3b2;)/(100&#xb7;ADD)); A1=&#x3b1;100%&#x2212;&#x3b1;85%; A2=&#x3b1;100%&#x2212;&#x3b1;60%; DenominatorCRIT=[(PeaksMean/ADD)+(PPO(&#x3b1;,&#x3b2;)/(8&#xb7;ADD))].

Opthalmic progressive addition lens for a presbyopic wearer; method for providing such a lens

An ophthalmic progressive addition lens for a myopic or emmetropic presbyopic wearer which has a prescribed far vision mean refractive power and a non nil prescribed addition, ADD, the lens having a far vision reference point, a mean refractive power, PPO(&#x3b1;, &#x3b2;), a module of resulting astigmatism, ASR(&#x3b1;, &#x3b2;), a meridian line, ML(&#x3b1;, &#x3b2;), the (&#x3b1;, &#x3b2;) functions being determined in as-worn conditions of the lens by the wearer for gaze directions (&#x3b1;, &#x3b2;) joining the center of rotation of the eye, CRE, and the lens, wherein &#x3b1; is a lowering angle in degree and &#x3b2; is an azimuth angle in degree, and wherein a lens criterion, A1/A2, fulfils: A1/A2&#x2265;0.50, wherein: A1=&#x3b1;100%&#x2212;&#x3b1;85%; A2=&#x3b1;100%&#x2212;&#x3b1;60%.

Ophthalmic progressive addition lens for a myopic or emmetropic presbyopic wearer; method for providing such a lens

A pair of spectacle progressive lenses configured for a wearer suffering from convergence insufficiency or imbalance. The lens of the pair which is dedicated to the dominant eye has inset values appropriate for matching convergence of the dominant eye, but the other lens of the pair, which is dedicated to the non-dominant eye, has inset values substantially equal to zero. Such lens pair helps in suppressing the non-dominant eye for intermediate and near vision tasks, therefore avoiding or limiting symptoms of convergence insufficiency.

Spectacles comprising a pair of progressive lenses

A method implemented by computer means for calculating a lens optical system of a spectacle ophthalmic lens for a wearer. The method includes providing an aberration target lens fulfilling the requirements of: a first set of aberration data of the aberration target lens, a first set of wearing parameters of the aberration target lens, and a first set of lens parameters of the aberration target lens. The method further includes providing a distortion target consisting of target distortion values where the target distortion values are reduced or enhanced in at least a modified distortions zone when compared to the distortion values of the aberration target lens, and calculating the lens optical system by using an optimization method which jointly uses the aberration target lens and the target distortion values.

Method implemented by computer means for calculating a lens optical system of a spectacle ophthalmic lens for a wearer

Methods for augmented reality, and to lenses, systems and methods for improving visual comfort of a wearer equipped with a head-mounted device configured for display of information content.

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Charenton-le-Pont, France

Sebastien Fricker