Essilor International (compagnie Generale D'optique)

Essilor International

Universitéde Montreal

Essilor Canada Ltee

Université Paris—sud

Essilor Groupe Canada Inc.

Guillaume Giraudet

Jocelyn Faubert

Rafael Doti

Eduardo Lugo

Björn Drobe

Matthieu Guillot

Bjorn Drobe

Konogan Baranton

Claudine Biver

Isabelle Poulain

Samy Hamlaoui

Delphine Tranvouez-bernardin

David Rio

Jean-Paul Cano

Thierry Bonnin

Gildas Marin

Laurent Calixte

Bruno Fermigier

John Biteau

Philippe Pinault

Sébastien Fricker

Richard Muisener

Cédric Begon

Stéphane Boutinon

Estelle Netter

Sylvette Maisonnier

Richard Bosmans

Nicolas Lavillonniere

Adèle Longo

Adéle Longo

Daniel Spiegel

Alain Goulet

Adrien Bak

Michel-Ange Amorim

Benoit Fourre

Brice Isableu

Delphine Tranvouez-Bernardin

A lens element intended to be worn in front of an eye of a wearer having at least a first and a second set of optical elements providing respectively a first and a second optical function. When worn by a wearer, an optical element of the first set is located at a greater distance from the center of rotation of the eye than an optical element of the second set. At least some of the optical elements of the first set and the second set are disposed in a mutual relationship in such a way that, for at least one gaze direction, a first and a second cumulative optical effect are provided at the same time for respective at least first and second incoming light beams.

Lens element

A lens element intended to be worn in front of an eye of a wearer including at least a first and a second set of optical elements providing respectively a first and a second optical function. When worn by a wearer, an optical element of the first set is located at a greater distance from the center of rotation of the eye than an optical element of the second set. At least some optical elements of the second set are disposed with respect to the optical elements of the first set of the lens element to provide according to a respective first and a second gaze direction on different zones of the retina of the eye of the wearer distinct cumulative optical effects.

The invention relates to a lens element () intended to be worn by a wearer, comprising at least one prescription portion () having a first optical function configured to provide a dioptric correction of an eye of the wearer when the lens element () is worn by said wearer based on a prescription of the wearer, and a plurality of lenslets (), each lenslet () of said plurality of lenslets being configured to provide at least one second optical function which differs from the first optical function, wherein each lenslet () has a shape, a size and a position such that at least one portion of said lens element () has a modulation transfer function (MTF) whose values are configured so that the modulation transfer function of said lens elementover a range of spatial frequencies comprised between 1 and 5 cycles per degree are lower or equal to 0.6.

Lens element and corresponding computer-implemented determining method

A method for determining a design of a progressive lens intended to be worn by a future wearer, the progressive lens comprising a front surface and a back surface, at least one of the front surface and the back surface comprising a progression profile on its general spherical shape, said at least one progression profile defining a meridian line extending from a distance-vision point to a near-vision point, said meridian line comprising a vertical portion passing through the distance-vision point and an inclined portion passing through the near-vision point, the vertical portion and the inclined portion forming an angle between them, the method including obtaining first data representative of a first measurement of a first postural instability of the future wearer when seeing a visual pattern moving along an mediolateral direction, and determining a reparation between the first progression profile and the second progression profile based on the first data.

Method for determining a progressive lens and associated system

A method and associated instrument in which an optical system is switched from a first to a second refractive power states, to provide a first, and then a second refraction correction to an eye of a subject, the switching being carried on without interrupting a light beam coming from a target object and transmitted by the optical system to the eye of the subject. The switching is carried on in order to circumvent an intermediate refraction correction that is in between said first and second refraction corrections, or with a speed higher than a given limit.

Method and instrument for providing at least one eye of a subject with a first refraction correction and with a second refraction correction to be compared with each other

A method for determining a design of a progressive lens intended to be worn by a future wearer, the progressive lens comprising a front surface and a back surface, at least one of the front surface and the back surface comprising a progression profile on its general spherical shape, said at least one progression profile defining a meridian line extending from a distance-vision point to a near-vision point, said meridian line comprising a vertical portion passing through the distance-vision point and an inclined portion passing through the near-vision point, the vertical portion and the inclined portion forming an angle between them, the method comprising obtaining first data representative of a first measurement of a first postural instability of the future wearer when seeing at a visual pattern moving along an anterior-posterior direction, and determining the angle of the inclined portion based on the first data.

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

An ophthalmic device for reducing dyslexia effects for a wearer including a frame intended to be worn by the wearer and a blinking illuminating element coupled to the frame comprising at least one light source configured to emit light in front of the wearer's head so as to lighten a medium observed by the wearer, said at least one light source being configured to be successively switched on and switched off at a predetermined frequency when the blinking illuminating element is activated.

Ophthalmic device with a blinking illuminating element for reducing dyslexia effects

A method for determining an optical system intended to equip a person on the basis of the adaptability of the person to a visual and/or proprioceptive modification of his environment, the method including a person visual behaviour parameter providing, during which a person visual behaviour parameter indicative of the visual behaviour of the person relative to a given state of the environment is provided; a reference value providing, during which a first value of the person visual behaviour parameter corresponding to a reference state of the environment is provided; a visual and/or proprioceptive modification providing, during which a visual and/or proprioceptive modification of the reference state of the environment is provided so as to define a modified state of the environment; and determining, during which an optical parameter of the optical system is determined based on the first value of the person visual behaviour parameter and on a second value of the person visual behaviour parameter associated with the modified state of the environment.

Method and system for determining an optical system intended to equip a person on the basis of the adaptability of the person to a visual and/or proprioceptive modification of his/her environment

A method for determining an optical system intended to equip a person on the basis of the adaptability of the person to a visual and/or proprioceptive modification of his environment, the method. including a person visual behaviour parameter providing, during which a person visual behaviour parameter indicative of the visual behaviour of the person relative to a given state of the environment is provided; a reference value providing, during which a first value of the person visual behaviour pa ameter corresponding to a reference state of the environment is provided; a visual and/or proprioceptive modification providing, during which a visual and/or proprioceptive modification of the reference state of the environment is provided so as to define a modified state of the environment; and determining, during which an optical parameter of the optical system is determined based on the first value of the person visual behaviour parameter and on a second value of the person visual behaviour parameter associated with the modified state of the environment.

Active vision system comprising: first and second customizable ophthalmic lenses () having an electrically variable occultation between substantially transparent and substantially obscured states; identification device () adapted for identifying whether the wearer's viewing state is in a near vision viewing state when wearing the customizable ophthalmic lenses; and processor () configured to: switch the electrically variable occultation of one of the customizable ophthalmic lenses () from the first to the second light occultation states when a near vision viewing state (NVVS) is identified by the identification device while at the same time the other lens is in the transparent state; and control the electrically variable occultation of the customizable ophthalmic lenses () such that they are in the first light occultation state when the wearer's viewing state is identified as being different from a near vision viewing state (NVVS) by identification device ().

Method for improving visual comfort to a wearer and associated active system of vision

Method for measuring the visually-induced postural instability of a person is described, the method comprising a display providing step (S) during which a visual display device is provided. The display device is arranged so as to display a dynamic visual pattern in at least 50% of the lower half of the visual field of the person, leaving an upper half of the visual field of the person free. The method also comprises a display step (S) during which a dynamic visual pattern is displayed on the visual display device. The method further comprises a measuring step (S) during which a parameter representative of the postural instability is measured when the person is gazing at a fix target straight in front while having the dynamic visual pattern displayed on the visual display device.

Method for measuring the visually-induced postural instability of a person

Method for determining the relative amplitude of eye and head movements of an individual, comprising: &#x2014;a target providing step during which a list of visual targets comprising at least two different visual targets is provided; &#x2014;a reference positioning step; &#x2014;a reference target providing step during which a reference target comprising a visual and auditory target is provided; &#x2014;a reference target gazing step during which the individual gazes at the reference target; &#x2014;a peripheral target providing step during which a peripheral target comprising a visual and auditory target is provided; &#x2014;a peripheral target gazing step during which the individual gazes at the peripheral target; and, &#x2014;a rotation measurement step during which the angle of rotation of the individual's head and the angle or rotation of the individual's eyes are measured.

Method for determining eye and head movement of an individual

A method for providing a spectacle ophthalmic lens to a wearer, the method comprising the following steps: providing a value, SV, representing the sensitivity of the wearer referred to a scale of sensitivity to perception of spatial orientation, according to both visual and non visual frames of reference; calculating a design of the spectacle ophthalmic lens or selecting a design in a spectacle ophthalmic lens design data base by adapting the management of residual astigmatism and/or optical power repartition according to gaze direction based on the value, SV, representing the sensitivity of the wearer referred to a scale of sensitivity to perception of spatial orientation.

Method for providing a spectacle ophthalmic lens by calculating or selecting a design

The invention relates to a method for characterizing a perception of blur by a subject () in order to determine a dioptric blur value for an image (C) observed by the subject. The image has a blur generated by the low-pass filtering of the image components in accordance with the respective space frequencies of said image components. An indication of the perception thereof of blur in the image is provided by the subject and is associated with the dioptric blur value. Several images associated with different dioptric blur values are used for defining a dioptric blur threshold value for the subject that corresponds to a blur perception criterion. The invention can be used for adjusting the design of a progressive lens for the subject in accordance with the sensitivity to said visual blur of said object.

Growing community of inventors

Charenton-le-Pont, France

Guillaume Giraudet