Essilor International (compagnie Generale D'optique)

Essilor International

Soazic Mousset

Cyril Guilloux

Claude Pedrono

Aude Contet

Damien Paille

Laurent Calixte

Isabelle Poulain

Bernard Bourdoncle

Marie-Anne Berthezene

Bruno Amir

Agnes Ladous

Ahmed Haddadi

Thierry Bonnin

Jérôme Moine

Cécile Petignaud

Bastien Feret

Patricia Koh

Agnès Ladous

The invention relates to a method () for correcting an individual behavior for using a pair of spectacles in optimized conditions, said individual wearing frame (). According to the invention said method comprises the following steps: &#x2014;a step () of determining parameters that characterize the behavioral conditions of the individual using correcting means securely fastened to the frame of the frame () in the preceding various situations for a set time; &#x2014;a step () of comparing said parameters with preset reference values; and &#x2014;a step () of correcting the behavior of the individual using detecting means () that are securely fastened to the said frame (), and that trigger when the difference between a parameter and the corresponding reference value diverges beyond a preset threshold value.

Method for correcting a wearer behaviour for using a pair of spectacles in optimized conditions

A method of determining binocular performance of a pair of spectacle lenses comprises: a eyes characteristics providing step, a pair of spectacle lenses providing step, a environment providing step, a binocular performance criteria selecting step, and a binocular performance criteria determining step, wherein the at least one binocular performance criterion is selected among one or a combination of the following criteria groups consisting of central vision criteria group and/or peripheral vision criteria group.

Method for determining binocular performance of a pair of spectacle lenses

The invention relates to a finished or semi-finished lens which comprises: a disc containing all the points of the lens that have the same abscissa and the same ordinate as points located within a circle in the reference plane having a diameter of 30 millimeters and centered on the prism reference point; a progression length of less than 14.5 millimeters; a first specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the nasal area and in the disc; and a second specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the temporal area and in the disc; a first ratio between: the maximum gradient of the cylinder for the points of the lens that have the same abscissa and the same ordinate as the points located on segments connecting the mounting cross to the first and second specific points, and surface addition of less than 0.095 per millimeter; and a second ratio between: the maximum cylinder value of the first and second specific points, and surface addition of no more than 0.85. The invention enhances the comfort of the wearer.

Progressive multifocal ophthalmic lens

A process for designing an ophthalmic progressive eyeglass comprises providing an initial front surface and an initial back surface. Respective addition values of front and back surfaces of the eyeglass are varied based on said initial front and back surfaces using a surface derivation tool. These surface addition values are selected so that the eyeglass exhibits an eyeglass addition value which matches a wearer's prescription and a value for a design feature which matches a target value. Said target value may be used for customizing the ophthalmic progressive eyeglass. The process does not require point-to-point surface optimization.

Process for designing an ophthalmic progressive eyeglass

A method of determining binocular performance of a pair of spectacle lenses comprises: a eyes characteristics providing step, a pair of spectacle lenses providing step, a environment providing step, a cyclopean eye positioning step, a binocular performance criteria defining step, and a binocular performance criteria determining step, wherein the cyclopean eye position is customized.

The invention relates to a method for determining an ophthalmic lens for a person (i.sub.1, i.sub.2, i.sub.3) to wear said lens, comprising the following steps: i) determination of the size (T.sub.1, T.sub.2, T.sub.3) or height of the eyes (H.sub.1, H.sub.2, H.sub.3) of the person to wear the lens; and ii) calculation of at least one characteristic of the ophthalmic lens according to the size (T.sub.1, T.sub.2, T.sub.3) or the height of the eyes (H.sub.1, H.sub.2, H.sub.3) of the person to wear the lens. The ophthalmic lens can be progressive strength or unifocal. The invention also relates to an optimization method and a method for producing an ophthalmic lens implementing such a definition method. The invention further relates to a set of lenses having at least one characteristic that depends on the size and the height of the eyes of the person to wear the lens.

Method for determining, optimizing and producing an ophthalmic lens and set of ophthalmic lenses

A method for determining the value of the inset of a progressive addition lens according to a wearer comprising the steps of: providing convergence data, determining from the convergence data the inset of the progressive addition lens considering at least the convergence data and the prismatic effect of the progressive addition lens.

Method for determining the inset of a progressive addition lens

The invention relates to a method for determining an aspherization layer for an ophthalmic lens for a wearer for whom a power and an astigmatism have been prescribed. The method can be used equally satisfactorily on a unifocal or a multifocal lens. The invention also extends to the method for determining an ophthalmic lens from an aspoherization layer obtained by the method. The invention improves the optical performance of lenses obtained from semi-finished lenses in which the complex surface is unknown.

Method for determining an aspherization layer for an ophthalmic lens

A method for producing an ophthalmic glass () intended for an identified wearer of spectacles comprises distribution of an optical power addition between an anterior face (S) and a posterior face (S) of said glass. Said distribution of the addition is done in such a way as to modify an optical characteristic as a function of relative amplitudes of eye and head movements of the wearer. Superior comfort of the glass in use is thus obtained. The optical characteristic which is considered may be, in particular, a variation of magnification procured by the glass between far and near vision conditions. An improvement of the invention is to also modify a design of the progressive glass as a function of the amplitudes of the eye and head movements of the wearer, using only a single semifinished glass model of fixed design for each addition value of the anterior face.

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Charenton le Pont, France

Soazic Mousset