Abstract: An optical system having a spectral transmission profile having an average transmittance Ta between 380 nm and 780 nm and an average red light transmittance Tr between a first limit L1 and a second limit L2, with Tr<2*Ta/3 and L1=600 nm and L2=780 nm, and the optical system being configured to allow selectively retinal exposure of an eye to at least one selected range of wavelengths of light in the visible spectrum of 460 nm to 530 nm.

Abstract: An ophthalmic tinted lens has a visual transmission value TV for quantifying a first light intensity ratio which relates to light effective for human vision and transmitted through the lens in daylight condition, and also has a value of a chronobiological factor FC for quantifying a second light amount ratio which relates to light effective for a non-visual physiological effect and also transmitted through the lens in daylight condition. The TV-value and the FC-value expressed as percentage values meet the following condition: FC>1.1×TV+13.0 with 3%?TV?43%, or FC>0.7×TV+32 with 43%<TV?92%, for the ophthalmic tinted lens to combine solar protection and maintenance of circadian rhythms and better pupil constriction which are based on the non-visual physiological effect.

Abstract: Active optical filter adapted for a spectacle lens, the active optical filter being configured so as to filter light radiations over at least one predetermined range of wavelengths, wherein the full width at half maximum of the filtering function of the optical filter is smaller than or equal to 100 nm.

Abstract: It is proposed a method for defining a design of an ophthalmic tinted lens provided with a turquoise blue ophthalmic filter. It is provided at least one optical parameter value that is prescribed with reference to a clear ophthalmic lens. At least one non-null optical power value is determined from said at least one prescribed optical parameter value. At least one reduction value is obtained. At least one reduced optical power value is calculated in function of said at least one non-null optical power value and said at least one reduction value. The ophthalmic tinted lens design is defined on the basis of said at least one reduced optical power value. Methods for defining a design of a first and a second ophthalmic tinted lens are also proposed. It is also proposed a corresponding ophthalmic tinted lens.

Abstract: An ophthalmic set for myopia progression control includes a first component suitable for varying an amount of light that has wavelength values included in a modulation spectral range and enters an eye of a user. It further includes a control unit configured for controlling the first component so that light with wavelength values in the modulation spectral range enters the user's eye with varied intensity during daytime. The first component may include light sources and/or spectral filters, in particular arranged so as to be fitted on the user's face during appropriate durations. Preferably, light with wavelength values included between 360 nm and 520 nm, or between 440 nm and 520 nm, is increased in the morning and reduced in the evening.

Abstract: An ophthalmic set for myopia progression control comprises spectral filtering means arranged for being effective on light that enters a user's eye. The spectral filtering means selectively reduce blue-green light intensity, and possibly also amber light intensity. Preferably, said spectral filtering means are combined with wavefront modifying means within the ophthalmic set for increased efficiency in slowing-down myopia progression for the user. In possible embodiments, the spectral filtering means and wavefront modifying means are combined in spectacle lenses (1, 2), and the wavefront modifying means are comprised of microlenses (21) or light-diffusing elements.

Abstract: The invention relates to filter dedicated to protect eye cone cells and method associated. The eye cone cells protecting filter is intended to be applied to a transparent surface and to filter incident light for preventing eye cone cells of a user, from damages due to illumination at physiological light levels on the eye of said user, and having spectral characteristics to i) filter light wavelengths between 405 and 465 nanometers, and ii) transmit a filtered light reaching the eye cone cells and having a harmfulness on said eye cone cells under a predefined maximum threshold.

Abstract: This ophthalmic lens for improving vision has a light cut factor CutLED between 32% and 90%, for wavelengths ranging from 380 nm to 500 nm, defined by formula (I), where ? is a discrete or continuous sum operator, ? is the wavelength in nm, lens T % is the spectral transmittance of the lens in % and LED emission is the spectral distribution of a white light emitting diode; a mean luminous transmittance in the visible range higher than or equal to 75%; and light transmitted through the ophthalmic lens has a colorimetric value b*, as defined in the colorimetric CIE L*a*b* with illuminant D65, lower than 25.

Abstract: A computed factor allows quantifying the efficiency of a light filter to stimulate a non-visual physiological effect which is responsive to light entering into a subject's eye. The efficiency factor is based on a spectral light transmittance of the filter over the wavelength visible range, on a spectral sensitivity profile of the non-visual physiological effect, and on a spectral distribution of the light which enters into the subject's eye without using the filter. Such efficiency factor is useful in particular for an ophthalmic element designed for stimulating a non-visual physiological effect which is based on melanopsin light-absorption.

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: The invention relates to a method for determining a value quantifying the effect of an optical filter on a parameter linked to an eye, this optical filter blocking at least partially the transmission of light over a predetermined wavelength range, comprising the following steps: a) at least one spectral feature of the optical filter related to the transmittance of this optical filter at at least one wavelength in said predetermined wavelength range is provided, b) the value quantifying the effect of the optical filter on said parameter is calculated as a function of said at least one spectral feature of the optical filter provided in step a).

Abstract: An optical device including an optical substrate providing with an optical filter configured to inhibit transmission of harmful UV and/or blue light wherein the optical device is further configured to allow retinal exposure of an eye to at least one selected range of wavelengths of light in the visible spectrum of 460 nm to 560 nm, preferably of 480 nm to 520 nm.

Abstract: An optical system having a spectral transmission profile having an average transmittance Ta between 380 nm and 780 nm and an average red light transmittance Tr between a first limit L1 and a second limit L2, with Tr<2*Ta/3 and L1=600 nm and L2=780 nm, and the optical system being configured to allow selectively retinal exposure of an eye to at least one selected range of wavelengths of light in the visible spectrum of 460 nm to 530 nm.

Abstract: An optical system having a spectral transmission profile having an average transmittance Ta between 380 nm and 780 nm and an average red light transmittance Tr between a first limit L1 and a second limit L2, with Tr<2*Ta/3 and L1=600 nm and L2=780 nm, and the optical system being configured to allow selectively retinal exposure of an eye to at least one selected range of wavelengths of light in the visible spectrum of 460 nm to 530 nm.

Abstract: An ophthalmic tinted lens has a visual transmission value TV for quantifying a first light intensity ratio which relates to light effective for human vision and transmitted through the lens in daylight condition, and also has a value of a chronobiological factor FC for quantifying a second light amount ratio which relates to light effective for a non-visual physiological effect and also transmitted through the lens in daylight condition. The TV-value and the FC-value expressed as percentage values meet the following condition: FC>1.1×TV+13.0 with 3%?TV?43%, or FC>0.7×TV+32 with 43%<TV?92%, for the ophthalmic tinted lens to combine solar protection and maintenance of circadian rhythms and better pupil constriction which are based on the non-visual physiological effect.

Abstract: Active optical filter adapted for a spectacle lens, the active optical filter being configured so as to filter light radiations over at least one predetermined range of wavelengths, wherein the full width at half maximum of the filtering function of the optical filter is smaller than or equal to 100 nm.

Abstract: An active optical filter adapted for a spectacle lens, the active optical filter configured to filter light radiations over at least one predetermined range of wavelengths, wherein the full width at half maximum of the filtering function of the optical filter is smaller than or equal to 100 nm.

Abstract: The disclosed embodiments include user fatigue level analysis components, real-time visual behavior measuring devices, and methods for determining the fatigue level of a user. In one embodiment, a user fatigue level analysis component includes a memory configured to store computer executable instructions and a processor for executing the computer executable instructions. The computer executable instructions comprise instructions for receiving at least a visual behavior parameter indicative of the real time visual behavior of the user, for providing at least one sleep quality history parameter indicative of the sleep quality history of the user, and for determining the fatigue level of the user based on the analysis of the combination of the at least one visual behavior parameter and the at least one sleep quality history parameter.

Abstract: A head mounted display device comprising: a light emitting source, an optical waveguide adapted to collect light emitted from the light emitting source and to guide the collected light to the eye of a wearer when the head mounted display device is being worn by the wearer, a controller device adapted to control the emitted spectrum and/or radiance and/or light level emitted by the light emitting source.

Abstract: A computed factor allows quantifying the efficiency of a light filter to stimulate a non-visual physiological effect which is responsive to light entering into a subject's eye. The efficiency factor is based on a spectral light transmittance of the filter over the wavelength visible range, on a spectral sensitivity profile of the non-visual physiological effect, and on a spectral distribution of the light which enters into the subject's eye without using the filter. Such efficiency factor is useful in particular for an ophthalmic element designed for stimulating a non-visual physiological effect which is based on melanopsin light-absorption.