Abstract: A method for determining an optical lens adapted for a wearer and optimized for at least a given optical criterion having a target value around a specific gaze direction. The method includes determining an intermediate optical lens by optimizing, using an optimization function, an initial optical lens so that the difference between the value of the at least given optical criterion of the intermediate optical lens and the target value of gaze directions around a specific gaze direction is smaller than or equal to a threshold value, and determining the optical lens by optimizing the intermediate optical lens so as to obtain the largest zone of gaze directions around the specific gaze direction for which the difference between the value of the at least given optical criterion and the target value around the specific gaze direction is smaller than or equal to the threshold value.

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: A set of ophthalmic lenses is described where each ophthalmic lens has at a point of optical reference a maximum power and meets an optical performance criterion in standard wearing conditions, wherein the range of maximum powers of the set of ophthalmic lenses is greater than or equal to 10 D, and all the ophthalmic lenses of the set of ophthalmic lenses have been manufactured from a set of semi-finished lens blank, each semi-finished lens blank having the same base curve.

Abstract: Disclosed is a method for determining a specific near vision power of an ophthalmic lens to be provided to a wearer having an ophthalmic prescription, the specific near vision power being for near distance vision, the method including: an ophthalmic lens providing step during which at least an ophthalmic lens having a near distance vision zone including a mean power adapted for near distance vision is provided to the wearer; a near vision task speed determining step during which the processing speed of a near vision task by the wearer when wearing the provided ophthalmic lens is determined; wherein the ophthalmic lens providing step and the near vision task speed determining step are repeated with ophthalmic lenses having different mean power, so as to determine a specific near vision power corresponding to the mean power providing an improved near vision task processing speed.

Abstract: The invention relates to a method for determining at least an optical feature of an ophthalmic lens to be placed in a frame for vision correction of a subject, comprising: a) measuring (100) a value of a fitting parameter linked to the subject and/or the frame or a value of a dioptric parameter of the subject, thanks to a measurement process, b) providing (200) a level of uncertainty of said value measured in step a) depending on said measurement process, c) determining (400; 510; 620; 640) said optical feature of said ophthalmic lens by taking into account said value measured in step a) and said level of uncertainty provided in step b).

Abstract: A device for evaluating a performance of a target visual equipment for a visual task includes: at least one input adapted to obtain data) representative as a function of time of measurements of at least one parameter associated with an initial wearer of an initial visual equipment performing the task in a scene, obtain a model of the scene, of a target wearer; at least one processor configured for virtually performing the task with the target equipment by using the scene and target wearer models, and by applying the representative data) as a function of time to the target wearer model; determining, on the basis of the virtual performing, at least one parameter of interest; providing the same, to determine to which extent the target equipment is appropriate for the target wearer, by evaluating the performance of the target equipment as a function of the parameter of interest.

Abstract: Disclosed is a method for determining a specific near vision power of an ophthalmic lens to be provided to a wearer having an ophthalmic prescription, the specific near vision power being for near distance vision, the method including: an ophthalmic lens providing step during which at least an ophthalmic lens having a near distance vision zone including a mean power adapted for near distance vision is provided to the wearer; a near vision task speed determining step during which the processing speed of a near vision task by the wearer when wearing the provided ophthalmic lens is determined; wherein the ophthalmic lens providing step and the near vision task speed determining step are repeated with ophthalmic lenses having different mean power, so as to determine a specific near vision power corresponding to the mean power providing an improved near vision task processing speed.

Abstract: A method includes acquiring prescription data including an addition value. The method includes generating virtual surface data of a progressive addition lens for a further operation of surfacing of a lens blank, the operation of surfacing being configured to transform the lens blank into a surfaced lens satisfying the prescription data. The generating virtual surface data includes selecting a virtual base surface in a virtual base surface database, the selection being independent of the prescribed addition value, processing the selected virtual base surface according to the prescribed addition value to obtain a modified virtual base surface, selecting a virtual adjusting surface in a virtual adjusting surface database at least on the basis of a value of a parameter relative to the modified virtual base surface, and combining the modified virtual base surface and the selected virtual adjusting surface to form a virtual progressive adjusted surface.

Abstract: Disclosed is a hoist apparatus including: an electric motor, and a control box that can be electrically powered by a power supply, the control box including at least an electronic control circuit, an electrical wiring and an external casing forming a box of the control box, the external casing including at least sidewalls and a removable lid closing the box, the control box controlling the operations of the electric motor thanks to the electrical wiring connected to the electronic control circuit, to the power supply and to the electric motor, and a monitoring device, wherein the monitoring device is an insert of the box, the monitoring device being arranged within an enclosure, the enclosure being an added part of the box or being an exchanged part of the box and wherein the monitoring device is connected to the electrical wiring.

Abstract: A lens element intended to be worn in front of an eye of a person includes a prescription portion having a first refractive power based on a prescription for correcting an abnormal refraction of the eye of the person and a second refractive power different from the first refractive power. The lens element further includes a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye to slow down the progression of the abnormal refraction of the eye.

Abstract: A method for determining a three dimensional performance of an ophthalmic lens including: calculating a domain in which a condition between a local optical criterion and at a threshold value is fulfilled; determining the three dimensional performance of the ophthalmic lens according to the domain. A method of calculating an ophthalmic lens includes the method.

Abstract: A lens element intended to be worn in front of an eye of a person includes a prescription portion having a first refractive power based on a prescription for correcting an abnormal refraction of the eye of the person and a second refractive power different from the first refractive power. The lens element further includes a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye to slow down the progression of the abnormal refraction of the eye.

Abstract: A method implemented by computer means of modifying an initial dioptric function of an initial ophthalmic lens surface, for manufacturing an ophthalmic lens, the method comprising: an initial surface providing step (S1), during which an initial surface Sini associated with a first coordinate system is provided, said initial surface Sini comprising a plurality of surface points P1, each surface point P1 having a mean sphere Sph(P1) and a cylinder Cyl(P1), said initial surface Sini providing said initial dioptric function, a modifying surface selection step (S2), during which a number n of nonzero modifying surfaces Smod1, . . . , Smodn is selected, said modifying surfaces Smod1, . . . , Smodn being associated with a second coordinate system, the modifying surface Smodi comprising a plurality of surface points Pi1, . . . Pij, . . .

Abstract: A lens element intended to be worn in front of an eye of a person includes a prescription portion having a first refractive power based on a prescription for correcting an abnormal refraction of the eye of the person and a second refractive power different from the first refractive power. The lens element further includes a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.

Abstract: A set of ophthalmic lenses is described where each ophthalmic lens has at a point of optical reference a maximum power and meets an optical performance criterion in standard wearing conditions, wherein the range of maximum powers of the set of ophthalmic lenses is greater than or equal to 10 D, and all the ophthalmic lenses of the set of ophthalmic lenses have been manufactured from a set of semi-finished lens blank, each semi-finished lens blank having the same base curve.

Abstract: Disclosed is a method for determining a specific near vision power of an ophthalmic lens to be provided to a wearer having an ophthalmic prescription, the specific near vision power being for near distance vision, the method including: an ophthalmic lens providing step during which at least an ophthalmic lens having a near distance vision zone including a mean power adapted for near distance vision is provided to the wearer; a near vision task speed determining step during which the processing speed of a near vision task by the wearer when wearing the provided ophthalmic lens is determined; wherein the ophthalmic lens providing step and the near vision task speed determining step are repeated with ophthalmic lenses having different mean power, so as to determine a specific near vision power corresponding to the mean power providing an improved near vision task processing speed.

Abstract: A spectacle ophthalmic lens having a front surface and a back surface, the spectacle ophthalmic lens including a nasal lateral zone and a temporal lateral zone, wherein the front surface includes a progressive or regressive front surface which provides at least a magnifying function in the nasal and/or the temporal lateral zone of the lens, and wherein the back surface substantially compensates dioptric effects of the magnifying function of the progressive or regressive front surface.

Abstract: A progressive multifocal lens adapted to correct a user's vision and including a first major surface and a second major surface, wherein the first major surface is positioned closest to the user's eye when the progressive multifocal lens is worn by the user, the progressive multifocal lens including: a far-distance vision region having a first refractive power, a near-distance vision region having a second refractive power, an intermediate-distance vision region having a third refractive power, and a first and a second progressive region, a main line of sight extending from the far-distance vision region to the near-distance vision and passing through the intermediate-distance vision region. The first progressive region joins the far-distance vision region and the intermediate-distance vision region and the second progressive region joins the intermediate-distance vision region and the near-distance vision region.

Abstract: A method of manufacturing an ophthalmic lens comprising: an ophthalmic lens data providing step (S1) during which ophthalmic lens data corresponding are provided, a semi-finished lens blank providing step (S2) during which a semi-finished lens blank is provided, a transfer function determining step (S3) during which the transfer function to be applied to the first optical surface of the ophthalmic lens so as to correspond to the first lens blank surface is determined, an one side lens data calculating step (S4) during which one side lens having second surface that corresponds to the second optical surface calculated by applying the transfer function, a machining step (S5) during which the semi-finished lens blank is machined according to the one side lens data, a deforming step (S6) during which the machined semi-finished lens blank is deformed so as to obtain the ophthalmic lens.

Abstract: A method implemented by computer means for calculating a lens optical system of a spectacle ophthalmic lens for a wearer. The method includes providing an aberration target lens fulfilling the requirements of: a first set of aberration data of the aberration target lens, a first set of wearing parameters of the aberration target lens, and a first set of lens parameters of the aberration target lens. The method further includes providing a distortion target consisting of target distortion values where the target distortion values are reduced or enhanced in at least a modified distortions zone when compared to the distortion values of the aberration target lens, and calculating the lens optical system by using an optimization method which jointly uses the aberration target lens and the target distortion values.