Essilor International

Melanie Heslouis

Benjamin Rousseau

Sebastien Fricker

Cyril Guilloux

Thierry Bonnin

Isabelle Poulain

Guilhem Escalier

Nacer Lakhchaf

Juliette Wierzbicki

Valerie Jolivet

Gildas Marin

Carlos Rego

Sarah Marie

Martha Hernandez-Castaneda

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 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

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

Disclosed is a method for optical design of a pair of ophthalmic lenses for correcting spherical and cylindrical refractive errors of the eyes of a wearer, including a step of defining the need for spherical and cylindrical correction of the wearer for various viewing distances, and a step of determining the spherical and cylindrical power of the ophthalmic lenses at viewing points with various proximities, in accordance with the correction needs of the wearer. The power of at least one of the two ophthalmic lenses is determined such as to limit the deviation obtained therebetween upon adding equivalent spherical power between the viewing points with various proximities and/or varying the cylindrical power vector between the viewing points with various proximities. Also disclosed is a pair of ophthalmic lenses designed according to such a method.

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Charenton-le-Pont, France

Melanie Heslouis