Abstract: The invention relates to a method of selection of an ophthalmic lens suitable for correcting at least an optical impairment of an eye of a wearer who observes a screen. According to the invention the method comprises the steps of: determining at least a characteristic of posture of the wearer observing said screen, determining a dioptric power value associated to said vision zone allowing the wearer when wearing the ophthalmic lens to have an easier reading of said screen, determining at least one characteristic of filtering means to adjust the light exposure of the wearer to said screen, and determining the vision zone based on dioptric power value, characteristic of posture of the wearer and characteristic of filtering means so that the vision comfort of the wearer is optimized when wearing the ophthalmic lens while observing a screen.

Abstract: The disclosed method uses a headset to be placed on the head of an individual, an image capture apparatus, and a sensor adapted to measure a value of a first parameter linked to the luminous intensity of a light present in the environment of the individual with a wavelength included in a predetermined wavelength range. The method includes the following steps: a) capturing at least an image of the environment with the image capture apparatus; b) measuring the measured value of the first parameter; c) displaying on a screen of the headset a corrected image based on the captured image, taking into account the measured value and the optical feature of the lens. An associated electronic device is also described.

Abstract: The invention relates to a method of selection of an ophthalmic lens suitable for correcting at least an optical impairment of an eye of a wearer who observes a screen.

Abstract: The disclosed method uses a headset to be placed on the head of an individual, an image capture apparatus, and a sensor adapted to measure a value of a first parameter linked to the luminous intensity of a light present in the environment of the individual with a wavelength included in a predetermined wavelength range. The method includes the following steps: a) capturing at least an image of the environment with the image capture apparatus; b) measuring the measured value of the first parameter; c) displaying on a screen of the headset a corrected image based on the captured image, taking into account the measured value and the optical feature of the lens. An associated electronic device is also described.

Abstract: A method for manufacturing an ophthalmic progressive addition lens (100) with customized design features adapted to a wearer, the method comprising the following steps: /a/ a providing step of a lens substrate; /b/ a modifying step in which a first target virtual lens is provided and modified so as to obtain a second target virtual lens, the second target virtual lens having a design feature parameter substantially equal to a customized design feature parameter; /c/ an optimizing step in which an optimized trial virtual lens is obtained by optimizing a trial virtual lens in such a manner that the optimized trial virtual lens has optical characteristics which are substantially equal to the characteristics of the second target virtual lens; and /d/ a manufacturing step of the ophthalmic progressive addition lens from the lens substrate according to the trial virtual lens. Method for the determination of a customized ophthalmic progressive addition lens with customized design features.

Abstract: The invention relates to a progressive ophthalmic lens and to a method of producing one such lens. Variations in the optical power and the astigmatism of a progressive ophthalmic lens (10) result from (i) spherical and cylindrical variations in the anterior face (2) of the lens and (ii) variations in another physical unit of the lens. In this way, it is possible to customise the design of the progressive lens as a function of at least one behavioural characteristic of the lens wearer. Said customisation can be repeated by modulating the values of the physical unit between the different points of the lens. As a result, progressive lenses with different designs can be obtained from identical semi-finished lenses. The physical unit can comprise the sphere and the cylinder of the posterior face of the lens (3).

Abstract: The invention relates to a device for determining the center of rotation of an eye of a person relative to a frame of reference associated with the person or with said person's eyeglasses, making it possible to determine the visual axis of the person along at least two non-parallel directions by viewing a target, and to define an optimum point of intersection of said axes as the center of rotation of the eye, at least two relative positions of said target and of the person's head being measured. In the invention, said target is constituted by a light source and is disposed at one end of a tubular support, with the other end being for disposing facing the person's eye, the support carrying a first position sensor, a second position sensor being for placing on the person's head.

Abstract: A method for manufacturing an ophthalmic progressive addition lens (100) with customized design features adapted to a wearer, the method comprising the following steps: /a/ a providing step of a lens substrate; /b/ a modifying step in which a first target virtual lens is provided and modified so as to obtain a second target virtual lens, the second target virtual lens having a design feature parameter substantially equal to a customized design feature parameter; /c/ an optimizing step in which an optimized trial virtual lens is obtained by optimizing a trial virtual lens in such a manner that the optimized trial virtual lens has optical characteristics which are substantially equal to the characteristics of the second target virtual lens; and /d/ a manufacturing step of the ophthalmic progressive addition lens from the lens substrate according to the trial virtual lens. Method for the determination of a customized ophthalmic progressive addition lens with customized design features.

Abstract: The invention relates to a device for determining the center of rotation of an eye of a person relative to a frame of reference associated with the person or with said person's eyeglasses, making it possible to determine the visual axis of the person along at least two non-parallel directions by viewing a target, and to define an optimum point of intersection of said axes as the center of rotation of the eye, at least two relative positions of said target and of the person's head being measured. In the invention, said target is constituted by a light source and is disposed at one end of a tubular support, with the other end being for disposing facing the person's eye, the support carrying a first position sensor, a second position sensor being for placing on the person's head.

Abstract: A progressive multifocal ophthalmic lens has a complex surface having a prism reference point, a fitting cross, a progression meridian having a power addition greater than or equal to 1.5 diopters. The lens has, under conditions when being worn: a reduced root mean square, normalized to the addition prescription, of less than 0.65 microns per diopter in a zone delimited by a circle centred on the prism reference point and with a diameter corresponding to a sweep of vision of 80°, a progression length of less than or equal to 25°, and a difference in normalized reduced root mean square between pairs of symmetrical points relative to a vertical axis passing through the fitting cross of less than 0.12 microns per diopter in a zone delimited by a semi-circle centred on the fitting cross and with a radius corresponding to raising viewing by 25°.

Abstract: The invention relates to a progressive ophthalmic lens and to a method of producing one such lens. Variations in the optical power and the astigmatism of a progressive ophthalmic lens (10) result from (i) spherical and cylindrical variations in the anterior face (2) of the lens and (ii) variations in another physical unit of the lens. In this way, it is possible to customise the design of the progressive lens as a function of at least one behavioural characteristic of the lens wearer. Said customisation can be repeated by modulating the values of the physical unit between the different points of the lens. As a result, progressive lenses with different designs can be obtained from identical semi-finished lenses. The physical unit can comprise the sphere and the cylinder of the posterior face of the lens (3).

Abstract: The optical system presents accommodation compensation, the system including in combination two multifocal lenses, one of them being an aperture lens and the other a field lens.

Abstract: A progressive multifocal ophthalmic lens has a complex surface having a prism reference point, a fitting cross, a progression meridian having a power addition greater than or equal to 1.5 diopters. The lens has, under conditions when being worn: a reduced root mean square, normalized to the addition prescription, of less than 0.65 microns per diopter in a zone delimited by a circle centred on the prism reference point and with a diameter corresponding to a sweep of vision of 80°, a progression length of less than or equal to 25°, and a difference in normalized reduced root mean square between pairs of symmetrical points relative to a vertical axis passing through the fitting cross of less than 0.12 microns per diopter in a zone delimited by a semi-circle centred on the fitting cross and with a radius corresponding to raising viewing by 25°.

Abstract: Progressive multifocal ophthalmic lens having a power addition prescription and presenting a complex surface having a fitting cross and a principal meridian of progression. The lens has, when being worn, a normalized reduced root mean square deviation of less than 0.025 microns per dioptre over a zone that includes the far vision control point and covering a sector whose apex lies 4° below the fitting cross with an angular aperture of between 150° and 160°; and a progression length of 25° or less, the progression length being defined as the angle of lowered of the view direction from the fitting cross down to the point on the meridian for which the wearer's optical power reaches 85% of the addition prescription. The lens is suitable for increased far vision with good accessibility to near vision.

Abstract: Progressive multifocal ophthalmic lens having a power addition prescription and presenting a complex surface having a fitting cross and a principal meridian of progression. The lens has, when being worn, a normalized reduced root mean square deviation of less than 0.025 microns per diopter over a zone that includes the far vision control point and covering a sector whose apex lies 4° below the fitting cross with an angular aperture of between 150° and 160°; and a progression length of 25° or less, the progression length being defined as the angle of lowered of the view direction from the fitting cross down to the point on the meridian for which the wearer's optical power reaches 85% of the addition prescription. The lens is suitable for increased far vision with good accessibility to near vision.

Abstract: The optical system presents accommodation compensation, the system including in combination two multifocal lenses, one of them being an aperture lens and the other a field lens.

Abstract: The invention relates to a method for fitting, in a frame, a progressive ophthalmic lens prescribed for a wearer. It proposes that only the horizontal position of the wearer's pupil be measured on the wearer. From this measurement, and from the total height of the pattern of the frame, the lens is positioned in the frame, and is then machined and fitted into the frame. The invention makes it possible, when fitting lenses, to avoid the errors brought about by the measuring of the height of the wearer's pupil with respect to the frame.

Abstract: The invention relates to a method for fitting, in a frame, a progressive ophthalmic lens prescribed for a wearer. It proposes that only the horizontal position of the wearer's pupil be measured on the wearer. From this measurement, and from the total height of the pattern of the frame, the lens is positioned in the frame, and is then machined and fitted into the frame.

Abstract: There is provided a spectacle frame 1, having a least one corrective lens the characteristics of which do not vary over time and having telemetry means 5 which set off an alarm 9, 10 when the distance measured by the telemetry means is less than a predetermined preference distance. This reference distance can for example be set at between 20 and 50 cm depending on the spectacle wearer. A kit is also provided comprising a frame, telemetry means and an alarm. The spectacle frame can be prescribed for slowing down the evolution of acquired myopia in children who are starting to acquire myopia; here, the spectacle frame is provided with progressive multifocal lenses. The telemetry means and alarm incite the child to respect a sufficient working distance for close vision.

Abstract: A progressive multifocal ophthalmic lens has a complex surface having a prism reference point, a fitting cross, a progression meridian having a power addition greater than or equal to 1.5 diopters. The lens has, under conditions when being worn: a reduced root mean square, normalized to the addition prescription, of less than 0.65 microns per diopter in a zone delimited by a circle centred on the prism reference point and with a diameter corresponding to a sweep of vision of 80°, a progression length of less than or equal to 25°, and a difference in normalized reduced root mean square between pairs of symmetrical points relative to a vertical axis passing through the fitting cross of less than 0.12 microns per diopter in a zone delimited by a semi-circle centred on the fitting cross and with a radius corresponding to raising viewing by 25°.