Abstract: A system for determining a prescription for an eye of a person, the system being configured to communicate with a mobile device including at least one first light source adapted to illuminate the eye with first light having a first optical wavelength, at least one second light source adapted to illuminate the eye with second light having a second optical wavelength different from the first wavelength, and a processor that measures the photorefraction of the eye at the first wavelength based on at least one picture of the eye recorded when illuminating the eye with first light, measures the photorefraction of the eye at the second wavelength based on at least one picture of the eye recorded when illuminating the eye with second light, determines the prescription for the eye based on the measured photorefraction at the first wavelength and the measured photorefraction at the second wavelength.

Abstract: A lens element intended to be worn in front of an eye of a wearer having a prescription portion configured to provide to the wearer in standard wearing conditions a first optical function based on the prescription of the wearer for correcting an abnormal refraction of said eye of the wearer, and a plurality of contiguous optical elements, wherein each optical element has a simultaneously bifocal optical function that provides simultaneously: a second optical function in standard wearing conditions and a third optical function of not focusing an image on the retina of the eye in said standard wearing conditions so as to slow down the progression of the abnormal refraction of the eye.

Abstract: A method for simulating an ophthalmic lens on an eye of a subject viewing a virtual scene using a light field display including a light field window. The method includes calculating a virtual ray between a point of the virtual scene and a point of an eye pupil plane, the virtual ray passing through a virtual lens and being defined on the basis of a model providing a deviation angle of the virtual ray through the virtual lens, repeating the calculating for a plurality of virtual rays passing through the virtual lens and joining couples of one point of the virtual scene and another point of the eye pupil plane, determining a light field representing a modified virtual scene, and generating the light field representing the modified virtual scene on the light field window towards the eye of the subject.

Abstract: A lens element intended to be worn in front of an eye of a wearer comprising: —a prescription portion configured to provide to the wearer in standard wearing conditions a first optical function based on the prescription of the wearer for correcting an abnormal refraction of said eye of the wearer, and—a plurality of contiguous optical elements, wherein each optical element has a simultaneously bifocal optical function that provides simultaneously: —a second optical function in standard wearing conditions and—a third optical function of not focusing an image on the retina of the eye in said standard wearing conditions so as to slow down the progression of the abnormal refraction of the eye.

Abstract: A method for estimating refraction of an eye of an individual using an image capturing device, the method including acquiring eccentric photorefraction images of the eye using the image capturing device when the eye is successively illuminated by a plurality of light sources, analyzing the eccentric photorefraction images by a calculation module in order to determine at least one refraction parameter, the analyzing is carried out by machine learning using at least one neural network configured to determine the at least one refraction parameter from the eccentric photorefraction images, the plurality of light sources in the step of acquiring being positioned at least two different eccentric distances from the optical axis of the image capturing device and/or arranged along at least two different directions transverse to the optical axis of the image capturing device.

Abstract: An optical device for capturing images of an eye of an individual, the optical device having a first measurement channel and a second measurement channel. The first measurement channel generates at least one first lighting beam directed toward the eye and along a first axis and to capture at least one first image of the eye when illuminated by the at least one first lighting beam. The second measurement channel is generates at least one second lighting beam directed toward the eye and along a second axis separated from the first axis by at least 5°, for example at least 10° or at least 20° and to capture at least one second image of the eye when illuminated by the at least one second lighting beam. The first measurement channel and the second measurement channel are synchronized together.

Abstract: A method for estimating refraction of an eye of an individual, including: a) providing a set of N acquired eccentric photorefraction images of the eye, b) setting values for a set of parameters including at least sphere, c) providing a set of N simulated eccentric photorefraction images, d) determining an estimator of a difference between the set of N acquired eccentric photorefraction images and the set of N simulated eccentric photorefraction images, e) performing an optimization using an optimization algorithm so as to optimize the estimator by adjusting values for the set of parameters and iterating steps c) and d), and f) deducing an estimation of at least one refraction parameter of the eye.

Abstract: A variable optical transmission device (2) comprising: —ariable transmission optics (4a, 4b) capable of varying an optical transmission between an initial transmission value (TV (ti)) and a target transmission value (TVtarget), and —a control unit (5) configured to control a transmission parameter of the variable transmission optics, wherein the control unit (5) is configured to control a response duration of the variable transmission optics as a function of the initial transmission value (TV (ti)) and the target transmission value (TVtarget).

Abstract: An optical device including an active programmable lens having an adjustable optical power depending on a prescription of a wearer and being relative to a vision distance and/or direction of an eye of the wearer, a vision sensor adapted to measure vision data relating to the vision distance and/or direction of the eye, and an optical power controller that includes a memory storing computer executable instructions and adapted to store measured vision data and two predetermined optical power states corresponding to an optical power relative to a range of vision distance and/or direction of the eye, and a processor for executing the stored computer executable instructions, which include instructions for adjusting the adjustable optical power between the predetermined optical power states with a resolution smaller than or equal to 0.25D when the vision data passes from one range of vision distance and/or direction to another.

Abstract: An optical device for a wearer intended to form an electrochromic ophthalmic lens, spectacle glasses comprising two such lenses fitted on a frame, and a method for manufacturing such an optical device. The optical device includes at least one electrochromic cell which has a rear shell and a front shell respectively defining for the optical device a backside surface proximal to at least one eye of the wearer and an opposite front surface, the rear shell and the front shell being provided with at least one pair of transparent electrodes and delimiting a sealed cavity filled with an electrochromic composition. One of the front shell and the rear shell includes a mineral glass substrate, and the other one includes an organic polymeric substrate, and the electrochromic cell forms a hybrid mineral-organic ophthalmic lens selected from plano lenses and prescription lenses satisfying a prescription for power correction.

Abstract: An optical device including an active programmable lens having an adjustable optical power depending on a prescription of a wearer and being relative to a vision distance and/or direction of an eye of the wearer, a vision sensor adapted to measure vision data relating to the vision distance and/or direction of the eye, and an optical power controller that includes a memory storing computer executable instructions and adapted to store measured vision data and two predetermined optical power states corresponding to an optical power relative to a range of vision distance and/or direction of the eye, and a processor for executing the stored computer executable instructions, which include instructions for adjusting the adjustable optical power between the predetermined optical power states with a resolution smaller than or equal to 0.25 D when the vision data passes from one range of vision distance and/or direction to another.

Abstract: A lens element intended to be worn in front of an eye of a person that includes a refraction area having a refractive power based on a prescription for the eye of the person, and a plurality of at least three non-contiguous optical elements, at least one optical element having a non-spherical optical function.

Abstract: A method for evaluating the visual acuity of a person using a mobile device having at least a front camera and a screen, the method including a user positioning step during which the user of a mobile device positions himself in front of a mirror at a predefined distance d/2, a mobile device positioning step during which the mobile device is positioned with the front camera of the mobile device facing the mirror, a distance measuring step during which a distance d between the front camera of the mobile device and a virtual image of the mobile device in the mirror is measured, a displaying step during which the screen of the mobile device displays optotypes, and an evaluation step during which the visual acuity of the user is evaluated.

Abstract: An eyeglass device including a variable transmission ophthalmic lens, a method for driving the transmission of such lens, and a non-transitory computer-readable storage medium for implementing such method. The eyeglass device comprises a light sensor configured for measuring an amount of light in the environment of a wearer and a controlling circuit configured for receiving at least light data from said light sensor and for driving the transmission of said ophthalmic lens on the basis of said light data. The controlling circuit is configured for driving the transmission of said ophthalmic lens on the basis further of movement data, said movement data being derived from an estimation of a movement of the wearer's head.

Abstract: The invention relates to a method for determining an ophthalmic lens intended to be worn by an individual, said ophthalmic lens being adapted to provide to the individual a vision correction at at least one given vision gaze direction, said vision correction being based on wearer data including prescription data of the individual, wherein the method comprises the steps of: determining a parameter pertaining to the accommodative dynamics of an eye of the individual, determining said ophthalmic lens based on said wearer data and on the parameter pertaining to the accommodative dynamics of an eye of the individual. The invention also relates to a device for determining the parameter pertaining to the accommodative dynamics of an eye of an individual in the method according to the invention.

Abstract: An optical device, to be used by a user driving a vehicle, the optical device including a controllable variable-tint lens and a controller, where the controller is configured to switch the optical device between at least two different modes, at least one mode being a driving mode and when the optical device is in the driving mode, a control parameter of the lens meets at least one driving criterion.

Abstract: The invention relates to a method for displaying a sharp image on a retina of an eye of the person, the person having a prescription for the eye of the person, the method comprising: providing at least one optical parameter relative to the prescription for the eye of the person; providing a plurality of initial sub-images, each initial sub-image corresponding to at least a part of the image to be displayed; providing a plurality of light beams configured to be focused substantially in the plane of a pupil of the eye at a plurality of corresponding different positions, each light beam being configured to carry an associated sub-image; for each sub-image, adapting the sub-image based on the at least one provided optical parameter and on the corresponding focused position of the light beam configured to carry the sub-image to form an adapted sub-image; and displaying each adapted sub-image carried by the associated light beam on the retina of the person.

Abstract: A method for determining at least one optical parameter of an eye of a person comprising displaying at least two sharp images on a retina of the eye of the person, the at least two images comprising a target and being carried by two light beams focused substantially in the plane of a pupil of the eye at at least two different positions, adapting a parameter of the target in each image based on feedback of the person relative to the change of the parameter of the target in the image, and determining the at least one optical parameter of the person's eye based on the adaption of the parameter of the target in each image.

Abstract: The disclosure relates to methods, controlling units, eyeglasses, computer programs and computer-readable storage media for controlling an optical transmission of a variable transmission ophthalmic lens. The method includes receiving from a light sensor a measured illuminance of the environment of a wearer, computing a change of illuminance measured during a predetermined time interval, comparing the computed change of illuminance with a first threshold, when the computed change of illuminance is greater than the first threshold, implementing first command configured for varying the transmission of the variable transmission ophthalmic lens from initial transmission value corresponding to a current transmission value to a first target transmission value, according to a first variation profile comprising a first phase during which the transmission overshoots the first target transmission value, and a second phase during which the transmission returns to the first target transmission value.

Abstract: A system for determining a prescription for an eye of a person, the system being configured to communicate with a mobile device including at least one first light source adapted to illuminate the eye with first light having a first optical wavelength, at least one second light source adapted to illuminate the eye with second light having a second optical wavelength different from the first wavelength, and a processor that measures the photorefraction of the eye at the first wavelength based on at least one picture of the eye recorded when illuminating the eye with first light, measures the photorefraction of the eye at the second wavelength based on at least one picture of the eye recorded when illuminating the eye with second light, determines the prescription for the eye based on the measured photorefraction at the first wavelength and the measured photorefraction at the second wavelength.