Abstract: 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.

Abstract: 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.

Abstract: 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.

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: The invention relates to a lens element (1) intended to be worn by a wearer, comprising at least one prescription portion (2) having a first optical function configured to provide a dioptric correction of an eye of the wearer when the lens element (1) is worn by said wearer based on a prescription of the wearer, and a plurality of lenslets (3), each lenslet (3) 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 (3) has a shape, a size and a position such that at least one portion of said lens element (1) has a modulation transfer function (MTF) whose values are configured so that the modulation transfer function of said lens element 1 over a range of spatial frequencies comprised between 1 and 5 cycles per degree are lower or equal to 0.6.

Abstract: A method for detecting a variation of a current refractive error of a person including obtaining an optical equipment comprising an optical lens, a dioptric function of the optical lens being adapted for correcting an initial refractive error of a person, the optical equipment further comprising a processing circuit comprising a processor operably connected to a memory. The method further includes using the memory, obtaining a current value of a parameter, the current value being indicative of a variation of a current refractive error of the person with respect to the initial refractive error. The method additionally includes using the processing circuit, detecting a variation of a current refractive error of the person with respect to the initial refractive error based on the obtained current value of the parameter.

Abstract: A lens element to be worn by a wearer and to provide a refractive power based on a prescription of the wearer is provided for correcting an abnormal refraction of the eye of the wearer, the lens element including: an optical microstructure having an optical function of not focusing an image on a retina of the eye of the wearer so as to slow down the progression of the abnormal refraction, in which the modulation transfer function of the lens element, for peripheral vision, is less than or equal to 0.8 over a range of spatial frequency comprised from 3 to 7 cycles per degree, when measured through the optical microstructure for a pupil aperture of 4 mm centered at 6.6 mm from the optical center of the lens element. A computer-implemented method for determining a lens element to be worn by a wearer is also provided.

Abstract: A lens element to be worn by a wearer and to provide a refractive power based on a prescription of the wearer is provided for correcting an abnormal refraction of the eye of the wearer, the lens element including: an optical microstructure having an optical function of not focusing an image on a retina of the eye of the wearer so as to slow down progression of the abnormal refraction of the eye of the wearer, in which a modulation transfer function of the lens element is greater or equal to 0.07 over a range of spatial frequencies from 10 to 25 cycles per degree, when measured through the optical microstructure for a pupil aperture of 4 mm centered at 6.6 mm from the optical center of the lens element. A computer-implemented method for determining a lens element to be worn by a wearer is also provided.

Abstract: 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 t

Abstract: An apparatus and method for determining at least one visual refraction feature of a subject by showing a visual stimulus to the subject. The apparatus includes an optical system arranged on an optical path between an eye of the subject and the visual stimulus, the optical system being adapted to provide an optical power that is continuously variable as a function of time (t), a control unit for driving the optical power of the optical system and an input device adapted for recording a response of the subject relative to a sharpness of the visual stimulus seen through the optical system, the control unit being adapted to adjust a speed of variation of the optical power (S) as a function of the response recorded.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The application relates to a method for adapting the visual and/or visual-motor behavior of a person, including: providing an optical parameter and a person visual parameter; providing a target value; modifying a visual and/or visual motor behavior; assessing a person visual parameter; determining a suitable visual and/or visual-motor behavior; and adapting the visual and/or visual-motor behavior of the person.

Abstract: Active vision system comprising: first and second customizable ophthalmic lenses (22) having an electrically variable occultation between substantially transparent and substantially obscured states; identification device (32) adapted for identifying whether the wearer's viewing state is in a near vision viewing state when wearing the customizable ophthalmic lenses; and processor (40) configured to: switch the electrically variable occultation of one of the customizable ophthalmic lenses (22) 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 (22) 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 (32).

Abstract: Method for measuring the visually-induced postural instability of a person is described, the method comprising a display providing step (S1) 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 (S2) during which a dynamic visual pattern is displayed on the visual display device. The method further comprises a measuring step (S3) 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.