Essilor International

Sébastien Fricker

Cyril Guilloux

Benjamin Rousseau

Matthieu Guillot

Konogan Baranton

Thierry Bonnin

Aurélie Le Cain

Laurent Calixte

Guillaume Giraudet

Isabelle Poulain

Guilhem Escalier

Anne-Catherine Scherlen

Fabien Muradore

Pauline Colas

Gerhard Keller

Nacer Lakhchaf

Marie Dubail

Juliette Wierzbicki

Asma Lakhoua

Mathieu Guillot

Bérangère Granger

Alain Goulet

Mélanie Heslouis

Valérie Jolivet

A method for determining a position variation of an eyewear equipment worn by a wearer includes obtaining reference data representing a reference position of an eyewear equipment worn by the wearer, the eyewear equipment including at least one ophthalmic lens and a frame on which the at least one ophthalmic lens is mounted, determining at least one reference position parameter indicative of a reference position of the eyewear equipment on the face of the wearer based on the reference data, obtaining current data representing a current position of the eyewear equipment worn by the wearer, determining at least one current position parameter indicative of a current position of the eyewear equipment in front of the eyes of the wearer based on the current data, and comparing the reference and current positions parameters to determine a position variation of the eyewear equipment worn by the wearer.

Position variations of the lenses of an eyewear equipment

A method for determining a component of an ophthalmic equipment, the method including acquiring a set of parameter values relating to the given wearer, processing the acquired set of parameter values to infer a group, the given wearer belonging to the inferred group and the inferred group belongs to a plurality of pre-established groups, the pre-established groups being elaborated based on respective sets of parameter values of a plurality of reference wearers. The method further including determining, based on the inferred group, at least a feature enabling to determine a component of an ophthalmic equipment of the given wearer, and determining a component of an ophthalmic equipment to be used by the wearer based on the at least a determined feature, each set of parameters values of the plurality of reference wearers including parameter values belonging to at least two distinct categories.

Method for determining a component of an ophthalmic equipment and associated system

A device for determining a head freedom area of an optical lens adapted for a wearer looking at a specific point in a scene through the optical lens comprises at least one input adapted to obtain optical lens data representing the optical features of an optical lens, to obtain wearing data and fitting data representative of the wearing conditions and fitting parameters of the optical lens, and to obtain a specific threshold value for an optical performance criterion; and at least one processor configured for determining the head freedom area that corresponds to the head positions of the wearer that provide optical performances greater than or equal to the specific threshold value when the wearer is wearing the optical lens in given wearing conditions upon given fitting parameters and looking at the specific point in the scene through the optical lens.

Head freedom area of an optical lens

This method for predicting at least one eye gazing parameter of a person wearing visual equipment includes steps of: measuring data of at least two individuals wearing visual equipment, such data including at least head motion parameters and eye gazing parameters of the individuals; measuring head motion parameters of the person in real-life conditions; comparing the head motion parameters of the person with the head motion parameters of the at least two individuals; and predicting the at least one eye gazing parameter of the person at least on the basis of the results of the comparing step and of the eye gazing parameters of the at least two individuals.

Method and system for predicting an eye gazing parameter and an associated method for recommending visual equipment

This device for evaluating a performance of a visual equipment for at least one wearer of that equipment to perform at least one visual task includes: at least one input adapted to obtain a model of a scene where the task is performed, a model of the task including a sequence of points to be looked at, a model of the wearer including a movable head and at least one rotationally movable eye; at least one processor configured for determining a head posture for at least one of the points so that the model of the wearer looks respectively at that point, determining at least one task-directed performance parameter for the wearer performing the task with the head posture for that point, on the basis of the wearer, scene and task models, providing the task-directed performance parameter for determining to which extent the equipment is appropriate for the wearer.

Device and method for evaluating a performance of a visual equipment for a visual task

A progressive ophthalmic lens adapted to a wearer in given wearing conditions having an addition and fulfilling an acuity performance criterion determined by: defining a set of at least three different vision distances including at least a first vision distance greater than or equal to 4 m, a second vision distance greater than or equal to 0.6 m and smaller than or equal to 2 m and a third vision distance smaller than or equal to 0.5 m, each vision distance being associated with an acuity loss threshold value and an acuity area threshold value, providing an acuity model defining acuity loss as a function of lens power and resulting astigmatism, determining of each vision distance using the acuity model the area of gaze directions for which the acuity loss is below the associated acuity loss threshold value.

Progressive ophthalmic lens

A method of calculating an optical system (OS) of an ophthalmic lens according to a given spectacle frame, said ophthalmic lens comprising a back surface (BS) and a front surface (FS) arranged to deliver an ophthalmic vision image (VI), a light-guide optical element having a proximal surface (PS) and a distal surface (DS), said light-guide optical element being arranged to output a supplementary image (SI), wherein the method comprises the steps of: providing at least a morpho-geometrical parameter data of the frame or of the light-guide optical element; optimizing the optical system (OS) according to at least the morpho-geometrical parameter data as a target.

Method of calculating optical characteristics of an optical system according to a given spectacle frame

A method for producing a customized progressive ophthalmic lens intended for a wearer having a prescription for a wearer's eye corresponding to said lens, the method comprising the following steps: a) providing an initial progressive ophthalmic lens design having a meridian line; b) providing binocular convergence data for the wearer; and c) modifying the initial design so that the meridian line is laterally shifted in position with respect to said initial design, for matching the convergence data provided at step b), for said prescription, and the modified design as resulting from step c) is used for the customized lens, wherein step b) comprises the following substeps: b) providing a visual stimulus in a sagittal plane of the wearer; and b) moving the visual stimulus within the sagittal plane between a predetermined maximum distance and a predetermined minimum distance.

Method for producing a customized progressive ophthalmic lens

A progressive ophthalmic spectacle lens () capable of correcting a wearer's ophthalmic vision and having a back surface (BS) and a front surface (FS), said lens comprising a light guide optical element arranged to output a supplementary image (SI) to the wearer through an exit surface (ES) of said light guide optical element, where the exit surface (ES), the back surface (BS) and an optical material located between said exit surface (ES) and said back surface (BS) form an optical device (OD) and wherein said optical device (OD) comprises an area of stabilized optical power.

Method of calculating an optical system of a progressive addition ophthalmic lens being arranged to output a supplementary image

A multifocal ophthalmic spectacle lens () capable of correcting a wearer's ophthalmic vision and having a back surface (BS) and a front surface (FS), said lens comprising a light guide optical element arranged to output a supplementary image (SI) to the wearer through an exit surface (ES) of said light guide optical element, where the exit surface (ES), the back surface (BS) and an optical material located between said exit surface (ES) and said back surface (BS) form an optical device (OD) and wherein said optical device (OD) comprises an area of stabilized optical power.

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Charenton le Pont, France

Sébastien Fricker