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: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: This ophthalmic lens has a front face and a rear face, and has: a light cut factor CutLED of at least 20% for wavelengths ranging from 380 nm to 500 nm, CutLED being defined by: CutLED = 100 - ? ? = 380 500 ? ( lens ? ? T ? % × LED ? ? emission ? ? % ) ? ? = 380 500 ? LED ? ? emission ? ? % where ? is a discrete or continuous sum operator, ? is the wavelength in nm, lens T % is the transmittance of the lens in % and LED emission % is the spectral distribution of a white light emitting diode in %; and an antireflective coating on the front and rear faces having a luminous reflectance in the visible region for scotopic vision Rv? lower than or equal to 1.5%.

Abstract: 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; and b) a step of determining at least one optical feature of said filter as a function of the determined representative quantity.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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; and b) a step of determining at least one optical feature of said filter as a function of the determined representative quantity.