Method for determining a filter for an ophthalmic lens as a function of a quantity representing a dynamic sensitivity of the eye of a wearer to a variation in a luminous flux

The invention relates to a method for determining a filter for an ophthalmic lens intended for being placed in front of the eye of a wearer, said filter being capable of improving or maintaining the visual comfort and/or the visual performance of said wearer. According to the invention, this method includes: a) a step of determining a quantity representing a dynamic sensitivity of the eye or the two eyes of the wearer to a variation in a luminous flux; and b) a step of determining at least one optical feature of said filter as a function of the determined representative quantity.

Method for filter selection

The present invention relates to a method implemented by computer means of selecting an optical filtration of an ophthalmic device for a wearer, the method comprising: - obtaining wearer's preferences relatively to at least one predetermined type of visual environment comprising multispectral or hyper spectral data; - selecting at least one filter: * corresponding to said wearer's preferences relatively to said at least one predetermined type of visual environment, and * determined on the basis of said multispectral or hyper spectral data.

METHOD FOR FILTER SELECTION

The present invention relates to a method implemented by computer means of selecting an optical filtration of an ophthalmic device for a wearer, the method comprising:—obtaining wearer's preferences relatively to at least one predetermined type of visual environment comprising multispectral or hyper spectral data;—selecting at least one filter: *corresponding to said wearer's preferences relatively to said at least one predetermined type of visual environment, and *determined on the basis of said multispectral or hyper spectral data.

Apparatus and method for assessing discomfort glare and/or disable glare in subject

The invention relates to a device (10) for assessing discomfort glare and/or disable glare in a subject, comprising:-at least one neural sensor (11) for detecting neural signals relating to the sensitivity of the subject's eye,-a control unit (15) for controlling the neural signals, the control unit is adapted to a) record a neural signal of the subject detected by the neural sensor when at least one eye of the subject receives a given light condition, b) provide a threshold neural signal characterizing a transition of the subject from a non-glare state to uncomfortable and/or disabled glare, c) evaluating whether the neural signal recorded in step a) correlates to uncomfortable glare and/or disabled glare of the subject by comparing the neural signal recorded in step a) with the threshold neural signal provided in step b). The invention also relates to a pair of glasses comprising said device, a method for assessing discomfort glare and/or disable glare of a subject, and a virtual reality ...

Method for Determining a Filter for an Ophthalmic Lens as a Function of a Quantity Representing a Dynamic Sensitivity of the Eye of a Wearer to a Variation in a Luminous Flux

The invention relates to a method for determining a filter for an ophthalmic lens intended for being placed in front of the eye wearer, said filter being capable of improving or maintaining the visual comfort and/or the visual performance of said wearer. According to the invention, this method includes: 1. A method for determining a filter for an ophthalmic lens intended to be placed in front of an eye of a wearer , said filter being able to improve or to maintain visual comfort and/or visual performance of said wearer , characterized in that it includes:a) a step of determining a quantity representative of a dynamic sensitivity of the eye or of both eyes of the wearer to a variation in a light flux, andb) a step of determining at least one optical characteristic of said filter depending on the determined representative quantity.2. The method as claimed in claim 1 , wherein said quantity representative of the dynamic sensitivity of the eye of the wearer to the variation in light flux is representative of the evolution of the visual comfort and/or of the visual performance of the wearer as a function of the variation in the light flux.3. The method as claimed in claim 1 , wherein claim 1 , in step b) claim 1 , an optical transmission of the filter at at least one wavelength claim 1 , in at least one spatial zone of this filter claim 1 , is determined to be all the lower as the quantity representative of the dynamic sensitivity of the eye of the wearer claim 1 , i.e. the quantity determined in step a) claim 1 , indicates a low adaptation capacity with respect to a positive variation in the intensity of the light flux.4. The method as claimed in claim 1 , wherein claim 1 , in step b) claim 1 , an optical transmission of the filter at at least one wavelength claim 1 , in at least one spatial zone of this filter claim 1 , is determined to be all the higher as the quantity representative of the dynamic sensitivity of the eye of the wearer claim 1 , i.e. the quantity ...

Method for determining a filter for an ophthalmic lens as a function of a quantity representing a dynamic sensitivity of the eye of a wearer to a variation in a luminous flux

The invention relates to a method for determining a filter for an ophthalmic lens intended for being placed in front of the eye wearer, said filter being capable of improving or maintaining the visual comfort and/or the visual performance of said wearer. According to the invention, this method includes:a) a step of determining a quantity representing a dynamic sensitivity of the eye or the two eyes of the wearer to a variation in a luminous flux; andb) a step of determining at least one optical feature of said filter as a function of the determined representative quantity.

METHODS AND SYSTEMS FOR DETERMINING A REFRACTION OF AT LEAST AN EYE OF A PERSON

Method for determining a refraction of at least an eye of a person under specific spectral conditions, the method including: an eye illumination step, during which the eye of the person is illuminated under the specific spectral conditions, the specific spectral conditions being provided by a polychromatic source having a spectrum which is different from the spectrum of a white light source and/or by a chromatic filter positioned before the eye of the person and illuminated by a source; and a refraction determination step during which the refraction of the eye of the person is determined under the specific spectral conditions.

Method for Determining a Light Filter Applied to a Spectacle Lens, Associated Display Device and Virtual Reality Helmet

The invention concerns a method for determining a light filter for a spectacle lens for improving or maintaining the visual comfort of an individual wearing spectacles, comprising the steps: a) collecting data relating to the needs or uses of the individual; b1) selecting a test filter on the basis of a predefined criterion; b2) selecting, as a function of the collected data, a luminous scene comprising an image determined as a function of the needs or uses, and a light source generating a visual discomfort for the individual not equipped with a filter; c) placing of the individual by presenting him with the luminous scene through the test filter; d) evaluating said criterion; e) comparing the result with a predetermined threshold; f) determining the suitable light filter as a function of the result. The invention also concerns a display device and a virtual reality helmet designed for said method. 1. A method for determining a light filter suitable for being applied to a spectacle lens in order to improve or maintain the visual comfort and/or the visual performance of an individual who wears said spectacles , said method comprising:a) collecting data relating to the needs and/or the habits of said individual;b1) selecting at least one trial filter based on at least one predefined evaluation criterion; an image or a film determined depending on the visual needs and visual habits of the individual; and', 'at least one light source that generates a discomfort and/or a loss of visual performance for the individual not equipped with filter;, 'b2) selecting, depending on said data collected in a), at least one luminous scene, said scene comprisingc) exposing said individual to a situation, wherein said luminous scene selected in b1) is visually presented to said individual through said trial filter selected in b1);d) evaluating said predefined criterion of b1) during the situation exposure of c);e) comparing the result of the evaluation of d) with a predetermined visual- ...

Optical Lens for Correcting Color Vision

The present invention relates to optical lens for correcting color vision for individuals with color vision deficiency comprising a substrate and an absorbing dye which has at least a minimum light transmission factor at a wavelength ranging from 515 nm to 80 nm that is lower than or equal to 40% and quickly varying transmission around 500 nm and around 595 nm. 115.-. (canceled)16. An optical lens comprising a substrate and a filtering means which has at least a minimum light transmission factor “Tmin (515-580)” in the visible spectrum at a wavelength ranging from 515 nm to 580 nm that is lower than or equal to 40% , said optical lens having the following transmission characteristics in the visible spectrum ranging from 380 to 700 nm:{'sup': −3', '−1, 'the transmission curve has a negative relative slope on the wavelength ranging from 485 to 515 nm and absolute value of said relative slope is larger than 4 10nm;'}{'sup': −3', '−1, 'the transmission curve has a positive relative slope on the wavelength ranging from 580 to 610 nm and value of said relative slope is larger than 4 10nm;'}an average transmission on the range from 435 to 485 nm which is larger than 5% and larger than the T515-580, T515-580 being the average transmission over the range from 515 nm to 580 nm;an average transmission on the range from 610 to 700 nm which is larger than T515-580; andan average transmission on the range from 515 to 580 nm which is lower than (T500+T595)/2, T500 being the transmission at 500 nm T595 being the transmission at 595 nm.17. The optical lens according to claim 16 , wherein the transmission curve has a negative relative slope on the wavelength ranging from 485 to 515 nm and absolute value of said relative slope is larger than 6.6 10nm.18. The optical lens according to claim 17 , wherein the transmission curve has a negative relative slope on the wavelength ranging from 485 to 515 nm and absolute value of said relative slope is larger than 8.2 10nm.19. The optical lens ...

METHOD OF DETERMINING A LIGHT FILTER APPLIED TO A GLASS OF EYEGLASSES; ASSOCIATED DISPLAY DEVICE AND VIRTUAL REALITY HELMET

L'invention concerne un procédé de détermination d'un filtre de lumière pour verre de lunettes pour améliorer ou maintenir le confort visuel d'un individu porteur des lunettes, comportant des étapes : a) collecter (11) des données relatives aux besoins ou usages de l'individu ; b1) sélectionner (21) un filtre d'essai sur la base d'un critère prédéfini ; b2) sélectionner (22), en fonction des données collectées, une scène lumineuse comprenant une image déterminée en fonction des besoins ou usages, et une source lumineuse génératrice d'un inconfort visuel pour l'individu non équipé de filtre ; c) mettre en situation (31) l'individu en lui présentant la scène lumineuse au travers du filtre d'essai ; d) évaluer (41) ledit critère ; e) comparer (51) le résultat avec un seuil prédéterminé ; f) déterminer (61) le filtre de lumière adapté en fonction du résultat. L'invention concerne également un dispositif d'affichage et un casque de réalité virtuelle conçus pour ledit procédé. The invention relates to a method for determining a light filter for spectacle lenses to improve or maintain the visual comfort of an individual wearing the glasses, comprising the steps of: a) collecting (11) data relating to the needs or uses of the individual; b1) selecting (21) a test filter based on a predefined criterion; b2) selecting (22), as a function of the collected data, a light scene comprising an image determined according to needs or uses, and a light source generating visual discomfort for the individual not equipped with a filter; c) placing the individual in a situation (31) by presenting the light scene to him through the test filter; d) evaluating (41) said criterion; e) comparing (51) the result with a predetermined threshold; f) determining (61) the matched light filter as a function of the result. The invention also relates to a display device and a virtual reality headset designed for said method.

METHOD FOR DETERMINING A FILTER FOR AN OPHTHALMIC LENS AS A FUNCTION OF A QUANTITY REPRESENTING A DYNAMIC SENSITIVITY OF A WEARER'S EYE TO A VARIATION IN A LUMINOUS FLUX

METHOD FOR DETERMINING A LIGHT FILTER APPLIED TO A GLASS OF GLASSES; DISPLAY DEVICE AND VIRTUAL REALITY HELMET THEREFOR

L'invention concerne un procédé de détermination d'un filtre de lumière pour verre de lunettes pour améliorer ou maintenir le confort visuel d'un individu porteur des lunettes, comportant des étapes : a) collecter (11) des données relatives aux besoins ou usages de l'individu ; b1) sélectionner (21) un filtre d'essai sur la base d'un critère prédéfini ; b2) sélectionner (22), en fonction des données collectées, une scène lumineuse comprenant une image déterminée en fonction des besoins ou usages, et une source lumineuse génératrice d'un inconfort visuel pour l'individu non équipé de filtre ; c) mettre en situation (31) l'individu en lui présentant la scène lumineuse au travers du filtre d'essai ; d) évaluer (41) ledit critère ; e) comparer (51) le résultat avec un seuil prédéterminé ; f) déterminer (61) le filtre de lumière adapté en fonction du résultat. L'invention concerne également un dispositif d'affichage et un casque de réalité virtuelle conçus pour ledit procédé. The invention relates to a method for determining a light filter for spectacle lenses to improve or maintain the visual comfort of an individual wearing glasses, comprising steps of: a) collecting (11) data relating to the needs or uses of the individual; b1) selecting (21) a test filter based on a predefined criterion; b2) selecting (22), based on the data collected, a light scene comprising an image determined according to the needs or uses, and a light source generating visual discomfort for the individual without a filter; c) situate (31) the individual by presenting him the light scene through the test filter; d) evaluating (41) said criterion; e) comparing (51) the result with a predetermined threshold; f) determining (61) the matched light filter according to the result. The invention also relates to a display device and a virtual reality helmet designed for said method.

DISPLAY DEVICE AND ASSOCIATED VIRTUAL REALITY HELMET

L'invention concerne un dispositif d'affichage (80) destiné à tester le confort visuel et/ou les performances visuelles d'un individu comportant un écran graphique (91) commandé par un micro-processeur pour afficher sur l'écran graphique une image ou un film susceptible d'être visionnée par l'individu testé. Selon l'invention, le dispositif d'affichage comporte en outre un système d'illumination additionnel (100) commandé par un autre micro-processeur ou par le même micro-processeur pour diffuser, à l'individu observant l'écran graphique, un flux lumineux additionnel (F1, F2) présentant une énergie, une répartition spectrale, une variation temporelle, une distribution spatiale, et/ou une distribution angulaire prédéterminée(s), le système d'illumination additionnel étant agencé par rapport à l'écran graphique de manière à laisser visible tout ou partie de l'image ou du film. L'invention concerne également un casque de réalité virtuelle (70) comprenant un tel dispositif d'affichage.

DISPLAY DEVICE AND HELMET OF VIRTUAL REALITY

L'invention concerne un dispositif d'affichage (80) destiné à tester le confort visuel et/ou les performances visuelles d'un individu comportant un écran graphique (91) commandé par un micro-processeur pour afficher sur l'écran graphique une image ou un film susceptible d'être visionnée par l'individu testé. Selon l'invention, le dispositif d'affichage comporte en outre un système d'illumination additionnel (100) commandé par un autre micro-processeur ou par le même micro-processeur pour diffuser, à l'individu observant l'écran graphique, un flux lumineux additionnel (F1, F2) présentant une énergie, une répartition spectrale, une variation temporelle, une distribution spatiale, et/ou une distribution angulaire prédéterminée(s), le système d'illumination additionnel étant agencé par rapport à l'écran graphique de manière à laisser visible tout ou partie de l'image ou du film. L'invention concerne également un casque de réalité virtuelle (70) comprenant un tel dispositif d'affichage.

METHOD FOR DETERMINING A FILTER FOR AN OPHTHALMIC LENS BASED ON A SIZE REPRESENTATIVE OF A DYNAMIC SENSITIVITY OF THE EYE OF A BEARER TO A VARIATION OF A LUMINOUS FLOW

L'invention concerne un procédé de détermination d'un filtre pour une lentille ophtalmique destinée à être placée devant l'œil d'un porteur, ledit filtre étant apte à améliorer ou à maintenir le confort visuel et/ou les performances visuelles dudit porteur, Selon l'invention, ce procédé comporte : a) une étape de détermination d'une grandeur représentative d'une sensibilité dynamique de l'œil ou des deux yeux du porteur à une variation d'un flux lumineux, et b) une étape de détermination d'au moins une caractéristique optique dudit filtre en fonction de la grandeur représentative déterminée. The invention relates to a method for determining a filter for an ophthalmic lens intended to be placed in front of the eye of a wearer, said filter being able to improve or maintain the visual comfort and / or the visual performance of said wearer, According to the invention, this method comprises: a) a step of determining a magnitude representative of a dynamic sensitivity of the eye or both eyes of the wearer to a variation of a luminous flux, and b) a step of determining at least one optical characteristic of said filter as a function of the determined representative magnitude.

Optical lens for correcting color vision

Device for determining a shift in a refraction value of an eye

Device for determining a shift in a refraction value of an eye lighted by a light beam emitted by a light source and transmitted through an optical filter, wherein: - memories (11) have in memory: a value (100) of an initial spectral feature of said light source, a value (200) of an optical feature of said optical filter, a refraction shift model (300) linking a magnitude associated with said shift and a spectral feature of the light beam; and - processors (12) are programmed to: determine (400) a value of a spectral feature of said light beam based on said value of the initial spectral feature of said light source and said value of the optical feature of said optical filter; and determine (500) said shift based on said refraction shift model and said value of the spectral feature of said light beam.

Article having filters selected to have metameric transmission spectra and a method for determining said filters

The invention provides a method for determining a first filter intended to be placed in front of an eye of a wearer and a second filter, different from the first filter, intended to be placed in front of an eye of a wearer, the method comprising the following steps: —providing a first transmission spectrum; —determining metameric transmission spectra of said first transmission spectrum; —determining said first filter based on said first transmission spectrum or based on a first metameric transmission spectrum selected from the metameric transmission spectra; and —determining said second filter based on a second metameric transmission spectrum selected from the metameric transmission spectra.

Device and method for assessing discomfort and/or disability glare of a subject

The invention relates to a device (10) for assessing discomfort glare and/or disability glare of a subject, comprising: —at least one neuro-sensor (11) for detecting a neural signal linked to the sensitivity of the eyes of the subject, —a control unit (15) adapted to a) record the neural signal of the subject detected by the neuro-sensor while at least one eye of the subject receives a given light condition, b) provide a threshold neural signal that is characteristic of a shift for the subject from no-glare state to discomfort glare and/or disability glare, c) assess whether the neural signal recorded in step a) correlates with a discomfort glare and/or disability glare of the subject by comparing said neural signal recorded in step a) to said threshold neural signal provided in step b). The invention also relates to an eyeglass comprising said device, to a method for assessing discomfort glare and/or disability glare of a subject, and to a virtual reality headset comprising the device.

Device and method for determining a shift in a refraction value of an eye of a subject induced by an optical filter

1. Device (10) for determining a shift in a refraction value of an eye of a subject lighted by a light beam emitted by a light source, said shift being induced by an optical filter through which said light beam is transmitted to the eye of the subject, said device (10) comprising one or more memories and one or more processors (12), wherein: - said one or more memories (11) have in memory: one or more values (100) of one or more initial spectral features of said light source, one or more values (200) of one or more optical features of said optical filter, and a refraction shift model (300) linking a magnitude associated with said shift and one or more spectral features of the light beam transmitted to the eye of the subject; and wherein - said one or more processors (12) are programmed to perform the following steps: determining (400) one or more values of one or more spectral features of said light beam transmitted to the eye of the subject through said optical filter based on said one or more values of one or more initial spectral features of said light source and said one or more values of one or more optical features of said optical filter; and determining (500) said shift in the refraction of the eye of the subject based on said refraction shift model and said values of the spectral features of said light beam transmitted to the eye of the subject through the optical filter.

Method for filter selection

The present invention relates to a method implemented by computer means of selecting an optical filtration of an ophthalmic device for a wearer, the method comprising: —obtaining wearer's preferences relatively to at least one predetermined type of visual environment comprising multispectral or hyper spectral data; —selecting at least one filter: —corresponding to said wearer's preferences relatively to said at least one predetermined type of visual environment, and —determined on the basis of said multispectral or hyper spectral data.

método para seleção de filtro

A presente invenção refere-se a um método implantado por meio de computador para selecionar uma filtração óptica de um dispositivo oftálmico para um usuário, sendo que o método compreende: - obter preferências de usuário em relação a pelo menos um tipo predeterminado de ambiente visual que compreende dados multiespectrais ou hiperespectrais; - selecionar pelo menos um filtro: * que corresponda às ditas preferências do usuário em relação ao dito pelo menos um tipo predeterminado de ambiente visual, e * determinado com base nos ditos dados multiespectrais ou hiperespectrais.

Método para seleção de filtro e dispositivo oftálmico para selecionar filtração óptica para usuário

a presente invenção refere-se a um método implantado por meio de computador para selecionar uma filtração óptica de um dispositivo oftálmico para um usuário, sendo que o método compreende: - obter preferências de usuário em relação a pelo menos um tipo predeterminado de ambiente visual que compreende dados multiespectrais ou hiperespectrais; - selecionar pelo menos um filtro: * que corresponda às ditas preferências do usuário em relação ao dito pelo menos um tipo predeterminado de ambiente visual, e * determinado com base nos ditos dados multiespectrais ou hiperespectrais.

Device and method for assessing discomfort and/or disability glare of a subject

lente oftálmica para melhoramento da visão de condução noturna e método para obtenção da mesma

“lente oftálmica para melhoramento da visão de condução noturna e método para obtenção da mesma”. essa lente oftálmica tem uma face dianteira e uma face traseira e tem: um fator de corte de luz cutled de pelo menos 20% para comprimentos de onda variando de 380 nm a 500 nm, cutled sendo definido pela: fórmula (i), onde s é um operador de soma discreto ou contínuo, ? é o comprimento de onda em nm, t% de lente é a transmitância da referida lente em % e % de emissão led é a distribuição espectral de um díodo emissor de luz branca em %; e um revestimento antirrefletivo nas faces dianteira e traseira tendo uma refletância luminosa na região visível para visão escotópica rv' igual ou inferior a 1,5%.

Optical design and spectral transmission optimization

The disclosure relates to a method for determining an ophthalmic lens adapted to an eye of a wearer, comprising a first and a second portion having a first and second spectral transmissions configured to provide an optical power shift while reducing optical aberration induced by unwanted astigmatism due to ophthalmic front and rear faces curvature.

Optical design and spectral transmission optimization

The disclosure relates to a method for determining an ophthalmic lens adapted to an eye of a wearer, comprising a first and a second portion having a first and second spectral transmissions configured to provide an optical power shift while reducing optical aberration induced by unwanted astigmatism due to ophthalmic front and rear faces curvature.

Method for selecting a lens having a special light transmission filter

The invention relates to a selecting method for selecting a lens amongst predetermined lenses having distinct light transmission filters, depending on an environment in which said lens is to be used, comprising steps of:- providing at least one image of said environment,- identifying a predetermined number of main colors on said at least one image,- estimating a first value of at least a color component for each main color,- determining a modified color corresponding to said main color seen through a first of said predetermined lenses,- calculating a second value of said color component for each modified color,- repeating the determining and calculating steps for each of the other predetermined lenses,- comparing, for each main color, said first value to each second value, and- deducing therefrom a selected lens.

A filter and a method for determining a filter taking into account the spectral transmittance of an ocular media of an eye of a wearer

Disclosed is a method for determining a filter for a visual equipment to be placed in front of the eye of a user to improve visual comfort and/or visual performance of the user, the method including: determining the spectral transmittance of an ocular media of an eye; and determining a filter based on the determined spectral transmittance of the ocular media so the filter has a spectral transmittance profile including: a first portion having a maximum transmittance value between 380 nm and a predetermined threshold, and a second portion with a decreasing transmittance value between the threshold and 670 nm. Also disclosed is a filter whose spectral transmittance is calculated based on the spectral transmittance of the user's ocular media, as well as a set of filters with each filter in the set having a spectral transmittance based on the spectral transmittance of the ocular media of users having different ages.

Device for determining a shift in a refraction value of an eye

Device for determining a shift in a refraction value of an eye lighted by a light beam emitted by a light source and transmitted through an optical filter, wherein: - memories (11) have in memory: a value (100) of an initial spectral feature of said light source, a value (200) of an optical feature of said optical filter, a refraction shift model (300) linking a magnitude associated with said shift and a spectral feature of the light beam; and - processors (12) are programmed to: determine (400) a value of a spectral feature of said light beam based on said value of the initial spectral feature of said light source and said value of the optical feature of said optical filter; and determine (500) said shift based on said refraction shift model and said value of the spectral feature of said light beam.

Device and method for assessing discomfort and/or disability glare of a subject

The invention relates to a device (10) for assessing discomfort glare and/or disability glare of a subject, comprising: - at least one neuro-sensor (11) for detecting a neural signal linked to the sensitivity of the eyes of the subject, - a control unit (15) adapted to a) record the neural signal of the subject detected by the neuro-sensor while at least one eye of the subject receives a given light condition, b) provide a threshold neural signal that is characteristic of a shift for the subject from no-glare state to discomfort glare and/or disability glare, c) assess whether the neural signal recorded in step a) correlates with a discomfort glare and/or disability glare of the subject by comparing said neural signal recorded in step a) to said threshold neural signal provided in step b). The invention also relates to an eyeglass comprising said device, to a method for assessing discomfort glare and/or disability glare of a subject, and to a virtual reality headset comprising the device.

Method for selecting a lens having a special light transmission filter

The invention relates to a selecting method for selecting a lens amongst predetermined lenses having distinct light transmission filters, depending on an environment in which said lens is to be used, comprising steps of: - providing at least one image of said environment, - identifying a predetermined number of main colors on said at least one image, - estimating a first value of at least a color component for each main color, - determining a modified color corresponding to said main color seen through a first of said predetermined lenses, - calculating a second value of said color component for each modified color, - repeating the determining and calculating steps for each of the other predetermined lenses, - comparing, for each main color, said first value to each second value, and - deducing therefrom a selected lens.

An ophthalmic lens comprising a filter and a method for determining a filter improving motion sensitivity of a wearer

The invention concerns a method for determining a filter for a visual equipment intended to be placed in front of the eye of a wearer, said filter being able to improve motion sensitivity of said wearer, the method comprising the following steps: I. subjecting the wearer to a plurality of visible light spectra having different levels of light intensity within the range of wavelengths from 400 to 600 nm; ii. determining a value representative of a dynamic contrast sensitivity of the wearer for each of the plurality of light spectra; iii. selecting at least one light spectrum based on the values improving the dynamic contrast sensitivity; and iv. determining the filter based on the at least one selected light spectrum.

An ophthalmic lens comprising a filter and a method for determining a filter improving motion sensitivity of a wearer

The invention concerns a method for determining a filter for a visual equipment intended to be placed in front of the eye of a wearer, the filter being able to improve motion sensitivity of the wearer, the method including the following steps: i. subjecting the wearer to a plurality of visible light spectra having different levels of light intensity within the range of wavelengths from 400 to 600 nm; ii. determining a value representative of a dynamic contrast sensitivity of the wearer for each of the plurality of light spectra; iii. selecting at least one light spectrum based on the values improving the dynamic contrast sensitivity; and iv. determining the filter based on the at least one selected light spectrum.

Methods and systems for determining a refraction of at least an eye of a person

Method for determining a refraction of at least an eye of a person under specific spectral conditions, the method comprising: - an eye illumination step, during which the eye of the person is illuminated under said specific spectral conditions, said specific spectral conditions being provided by a polychromatic source having a spectrum which is different from the spectrum of a white light source and/or by a chromatic filter positioned before the eye of the person and illuminated by a source, and - a refraction determination step during which the refraction of the eye of the person is determined under said specific spectral conditions.

Methods and systems for determining a refraction of at least an eye of a person

Method for determining a refraction of at least an eye of a person under specific spectral conditions, the method comprising: - an eye illumination step, during which the eye of the person is illuminated under said specific spectral conditions, said specific spectral conditions being provided by a polychromatic source having a spectrum which is different from the spectrum of a white light source and/or by a chromatic filter positioned before the eye of the person and illuminated by a source, and - a refraction determination step during which the refraction of the eye of the person is determined under said specific spectral conditions.