Abstract: An index value is calculated for rating an eyeglass with respect to protection against UV hazard. The index value is based on an integrated UV transmission value through the eyeglass and an integrated UV reflection value related to a back face of the eyeglass. Thus, the index value takes into account actual wearing conditions where UV eye exposure is due either to transmission through the eyeglass or reflection on the eyeglass back face. Respective index values obtained for a set of eyeglasses allow easy sorting of the eyeglasses with respect to UV protection efficiency.

Abstract: The present invention relates to a transparent optical article (e.g. an ophthalmic lens) comprising a thermoplastic substrate and a dye at least partially inhibiting light having a wavelength ranging from 400 to 460 nm and an optical brightener for at least partially balancing the colour imparted to the transparent optical article by the dye, wherein said optical brightener emits light by fluorescence at a wavelength ranging from 400 to 460 nm and is incorporated into a layer fused or bonded to the thermoplastic substrate. Said optical brightener allows for perception of said optical article as less yellow, and even colourless, to a user or to an observer. In addition, the UV-absorbers that may be present in the thermoplastic substrate do not negatively interact with the optical brightener.

Abstract: The present invention relates to a transparent optical article comprising at least one dye at least partially inhibiting light having a wavelength ranging from 400 to 460 nm and at least one selective optical brightener that emits light by fluorescence at a wavelength ranging from 400 to 460 nm. The optical brightener acts as a means for at least partially balancing the color imparted to the transparent optical article by the dye, thus allowing for perception of said optical article as less yellow, and even colorless to an user or an observer.

Abstract: The present disclosure provides systems and methods for determining an ophthalmic lens. In one implementation, three-dimensional coordinates of a center of rotation of the wearer's eye measured on the wearer in binocular vision are received. At least one direction of gaze measured in a natural posture and a determined position of the ophthalmic lens are received. Characteristics of the ophthalmic lens are calculated by using the coordinates measured for the center of rotation of the eye, the determined position of the lens, and the at least one direction of gaze measured in a natural posture. The characteristics of the ophthalmic lens are calculated by positioning a starting ophthalmic lens in the determined position and modifying the starting ophthalmic lens by wavefront analysis and/or optimizing using ray tracing dependent on the coordinates measured for the center of rotation of the eye and the determined position of the lens.

Abstract: A method for producing an ophthalmic lens, comprising an additive manufacturing step (100) for producing an intermediate optical element by depositing a plurality of elements of predefined volume of at least one material, said element comprising a target ophthalmic lens supplemented with at least one overthickness, and a flexible polishing manufacturing step (300) for producing said lens from said element by at least partially subtracting the overthickness so as to filter irregularities formed on said element during said additive manufacturing step; said additive manufacturing step comprising a step of defining a manufacturing setpoint for said element in which said overthickness is defined on the basis of predefined parameters of said flexible polishing step, i.e., a geometric characteristic representative of a spatial cutoff frequency and a geometric characteristic representative of a material removal capacity.

Abstract: The invention relates to a device for measuring the subjective refraction of a person in near and/or medium vision, which comprises, according to the invention, for each eye of the person, a correction mounting (3) provided with at least one corrective lens, the correction mountings (3) being arranged such that the person looks through the lenses. The position of each correction mounting (3) is variable such as to adjust an angle (a) between the axes of the lenses.

Abstract: A transparent optical element with dual light-polarizing effect comprises a first film forming a linear light-polarizer in a first surface portion of the element, and a second film forming a retarder plate within a second surface portion. The second surface portion is contained in the first surface portion. Such element may form an eyeglass adapted for providing stereoscopic vision by light polarization selection in the second surface portion, while providing protection against excessive light intensity in the first surface portion.

Abstract: An inflatable membrane apparatus (10) comprising (a) a fluid accumulator (11) having an upper and a lower face and a fluid entrance (12), said lower face being partly formed by an inflatable membrane (14), and (b) a trunconical part (15) projecting outwardly from the lower face of the accumulator whose greater base is closed by at least part of the inflatable membrane (14) and smaller base forms a circular opening, whereby, when pressurized fluid is introduced into the accumulator (11), deformation of the inflatable membrane (14) is guided by the trunconical part.

Abstract: A method for cutting-out a multi-layer ophthalmic lens (100) following a desired contour (C3), includes: a step of pre-blanking the ophthalmic lens (100) using a preliminary tool (210; 223), according to a preliminary contour (C1, C1?); a step of blanking the ophthalmic lens (100) using a blanking wheel (210), following a blanking contour (C2, C3); and a step of finishing the ophthalmic lens (100) using a finishing tool (212). According to the invention, the preliminary contour (C1, C1?) is larger than the desired contour (C3), and the blanking wheel (210) used has a granulometry of between 0.1 and 0.5 mm and is controlled in relation to the ophthalmic lens (100) so as to apply a radial force of between 0.1 and 5 N to the ophthalmic lens (100) during the blanking step.

Abstract: Ophthalmic lenses and spectacles for enhanced experience due to right-handedness or left-handedness.

Abstract: A method for providing to a wearer a customized progressive spectacle ophthalmic lens, comprising providing a residual astigmatism target value for the progressive spectacle ophthalmic lens-eye system according to a reference point, calculating a correction function, combining the correction function to the front or to the back surface of an initial optical data of an initial progressive spectacle ophthalmic lens.

Abstract: The invention relates to a method (20) for correcting an individual behaviour for using a pair of spectacles in optimized conditions, said individual wearing frame (4). According to the invention said method comprises the following steps:—a step (24) of determining parameters that characterize the behavioural conditions of the individual using correcting means securely fastened to the frame of the frame (4) in the preceding various situations for a set time;—a step (26) of comparing said parameters with preset reference values; and—a step (28) of correcting the behaviour of the individual using detecting means (1) that are securely fastened to the said frame (4), and that trigger when the difference between a parameter and the corresponding reference value diverges beyond a preset threshold value.

Abstract: The present invention relates to an electrochromic composition comprising at least one reducing compound and at least two oxidizing compounds, said at least two oxidizing compounds having similar oxydo-reduction potentials. More specifically, said at least two oxidizing compounds are selected from viologen derivatives. Said composition can be used as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Abstract: Disclosed is a progressive ophthalmic lens including a front surface and a rear surface, each surface having in each point an altitude, a mean sphere value and a cylinder value, the front surface of the lens including: —a far vision zone having a far vision reference point; —a near vision zone having a near vision reference point; —a main meridian, wherein the front surface is regressive and has: —a sphere gradient normalized value of less than 7.50·10?1 mm?1 at any point in a central portion of the lens including a portion of the main meridian (32), the far vision reference point (FV) and the near vision reference point (NV); —a cylinder gradient normalized value of less than 1.45 mm?1 at any point in the central portion of the lens.

Abstract: The invention relates to a device for determining a writing or reading mode of a person wearing spectacles including a frame and two lenses, the device comprising, according to the invention, means for measuring the distance between an element of the frame or the head and a working plane, means for measuring an angle of inclination (?) of a median plane of the two lenses relative to the vertical in a vertical median plane (P) of the head perpendicular to the median plane, and control means suitable for comparing the measured angle of inclination (?) with a set angle of inclination and for determining a reading mode or a writing mode of the person according to the comparison, the reading mode being associated with a predetermined set reading distance, and the writing mode being associated with a predetermined set writing distance.

Abstract: Method of shaping an ophthalmic eyeglass lens presenting two main optical working faces and including firstly a substrate made of a first material and presenting two main faces corresponding to the two main faces of the lens, and secondly at least one coating film made of a material distinct from that of the substrate, the coating film being previously secured on at least one of the main faces of the substrate, includes: cutting the lens by machining with a first tool over at least the thickness of the previously secured coating film, to define internally a working central portion of the coating film that presents a reduced outline; trimming the edge face of the substrate along the desired outline by machining with a second distinct tool, without machining the working central portion; and finishing the edge face of the substrate without machining the working central portion.

Abstract: A method of dip-coating a segmented multifocal lens (1) having a segment with a curved portion and a straight line portion, includes the steps of: placing the lens (1) on a basket support (21); immersing the lens (1) vertically in a coating solution bath (16); and withdrawing the lens (1) vertically from the bath (16); wherein the step of placing the lens (1) is performed such that the straight line portion of the lens (1) is in a vertical plane; and wherein, before or during the step of immersing the lens (1), the lens (1) is inclined to an inclined position between a vertical position and a horizontal position of the lens (1), in which inclined position the segment is downwardly inclined and the straight line portion of the segment remains in the vertical plane.

Abstract: Methods for edging optical articles comprising two main faces, at least one of which being coated with an outermost layer comprising fixing the optical article to a chuck with a holding pad that adheres to both the optical article and the chuck, wherein the surface of the holding pad contacting the optical comprises an adhesive material; and edging the optical article with an edging device; wherein prior to fixing the optical article to the chuck, at least one temporary layer of an organic material is formed onto said outermost layer of the optical article, the organic material of the temporary layer comprising at least one organic compound having a fluorinated functional moiety and at least one linking functional moiety capable of establishing at least one intermolecular bond or interaction with the adhesive material of the holding pad. Optical articles obtained via these methods.

Abstract: Provided is a coating technology additionally excellent in, for example, water repellency, oil repellency, and ease of dirt removal. An article having a coating on a substrate, in which the coating contains: (a) a polyhedral oligomeric silsesquioxane; and (b) an acrylate polymer having a structural unit represented by the following general formula (II): where Ra represents a hydrogen atom or a methyl group, Rf represents —CH2—(CF2)q—CF3 or —CH(CF3)2, and q represents an integer of 0 to 8.

Abstract: The invention relates to a transparent optical component having a cellular structure, comprising a network of walls (106), that forms a set of cells (104) that are juxtaposed parallel to a component surface. In order to produce such a component, an irregular set of points (101, 105) in the surface of the component is determined, each point being used to form a center of one of the cells. A position and an orientation of each wall are then determined such that the set of cells forms a Voronoï partition of the surface of the component. The component has a level of transparency that is compatible with an optical or ophthalmological use.