Abstract: An ophthalmic lens has a complex surface with a fitting cross, a progression meridian having a power addition greater than or equal to 1.5 diopters between far vision and near vision reference points. The complex surface has within a circle of radius 20 mm centered on the geometrical center of the lens, a cylinder value normalized to the addition of less than 0.8, and a rebound of the sphere quantity normalized to the addition of less than 0.04 on said circle. The surface also has a progression length less than or equal to 14 mm, defined as the vertical distance between the fitting cross and the point on the meridian for which the mean sphere reaches 85% of the addition. The lens is suited to hypermetropic wearers with a good perceptual comfort in peripheral vision and good accessibility in near vision.

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 an ophthalmic lens for long-sighted and intermediate vision comprising a complex surface provided with an optical centre, a substantially umbilicated meridian line and an average size sphere progression on the top surface equal to or greater than 0.50 diopters. The complex surface is provided in the top part thereof with a long-sighted vision area which is formed by cylinder points equal to or less than 0.25 diopters and covers an angular sector focused on the optical centre and whose angle is equal to 160°. Said complex surface also comprises an average size substantially constant sphere on the meridian line in the long-sighted vision area and a progression length equal to or less than 12 mm. Said progression length is defined as a vertical distance between the optical centre and a median point for which the average sphere if greater than 85% of progression on the average sphere in the optical centre.

Abstract: A method for defining a supplementary face for spectacles (or clip-on), comprising the steps of: i) choice of a lens suited to the wearer's prescription; ii) modelization of the position of the chosen lens and of the position of a supplementary face in front of the chosen lens; iii) choice of an optical function for the assembly of the chosen lens and supplementary face; iv) calculation of the characteristics of the supplementary face by optical optimization for a standard wearer, using the chosen optical function as optimization target. A supplementary face for spectacles, having: i) a detachable mounting device, suited to the detachable mounting of the supplementary face in front of a lens mounted in the spectacles; ii) a surface at least equal to the surface of the lens and iii) a continuous optical power variation over this surface.

Abstract: A method for the determination by optical optimization of a personalized progressive ophthalmic lens intended to be inserted into a frame chosen by a given wearer for whom a power addition has been prescribed in near vision, the method comprising the stages of: measuring parameters representing the frame chosen by the wearer; choosing an initial distribution of power and resulting astigmatism defect targets for each direction of viewing under wearing conditions in an ordinary frame; calculating transformation coefficients using the measured parameters representing the chosen frame and standard parameters; calculating a personalized distribution of the power and resulting astigmatism defect targets on the lens by applying the calculated transformation coefficients to the initial distribution. The method makes it possible to retain the proportion of the distribution between the far-vision, near-vision and intermediate-vision zones whatever the size and the shape of the frame chosen.

Abstract: The invention relates to an ophthalmic lens for long-sighted and intermediate vision comprising a complex surface provided with an optical centre, a substantially umbilicated meridian line and an average size sphere progression on the top surface equal to or greater than 0.50 diopters. The complex surface is provided in the top part thereof with a long-sighted vision area which is formed by cylinder points equal to or less than 0.25 diopters and covers an angular sector focused on the optical centre and whose angle is equal to 160°. Said complex surface also comprises an average size substantially constant sphere on the meridian line in the long-sighted vision area and a progression length equal to or less than 12 mm. Said progression length is defined as a vertical distance between the optical centre and a median point for which the average sphere if greater than 85% of progression on the average sphere in the optical centre.

Abstract: A method for the determination of a progressive ophthalmic lens for a given wearer comprises the stages of: determining the axial length (LA) of the wearer's eye, determining an ergorama associating a sight point with each direction of viewing under wearing conditions. determining power and resulting astigmatism defect targets for each direction of viewing under wearing conditions, the targets being a function of the axial length of the wearer's eye. calculating the power required on the lens for each direction of viewing by successive iterations in order to obtain the target power defect and the target resulting astigmatism.

Abstract: A method for the determination by optical optimization of a personalized progressive ophthalmic lens intended to be inserted into a frame chosen by a given wearer for whom a power addition has been prescribed in near vision, the method comprising the stages of: determining at least one parameter representing the frame chosen by the wearer; measuring parameters representing the wearer's head-eye behaviour; weighting the parameters representing the wearer's head-eye behaviour with the parameter representing the frame chosen by the wearer; determining power and resulting astigmatism defect targets for each direction of viewing under wearing conditions, the targets being associated with an individual merit function taking into account the weighted head-eye coordination parameters. The method allows the design of the lens to be adapted to the size and the shape of the frame chosen.

Abstract: An ophthalmic lens has a complex surface with an optical centre, a fitting cross (FC) situated 4 mm above the optical centre, a meridian having a power addition between reference points in far vision (FV) and in near vision (NV). The complex surface has a mean-sphere difference normalized to the addition on the meridian, between the geometric centre of the lens and the control point in far vision, less than or equal to 0.1; a progression length less than or equal to 14 mm; a rebound of the sphere quantity normalized to the addition on a circle with a radius of 20 mm centred on the geometric centre of the lens less than 0.11, and a maximum slope of the sphere variation normalized to the addition along the meridian comprised between 0.9 and 0.11 mm?1. The lens is suited to broadened far vision with a good accessibility to near vision.

Abstract: An ophthalmic lens has a complex surface with an optical centre, a fitting cross (FC) situated 4 mm above the optical centre, a meridian having a power addition between reference points in far vision (FV) and in near vision (NV). The complex surface has a mean-sphere difference normalized to the addition on the meridian, between the geometric centre of the lens and the control point in far vision, less than or equal to 0.1; a progression length less than or equal to 14 mm; a rebound of the sphere quantity normalized to the addition on a circle with a radius of 20 mm centred on the geometric centre of the lens less than 0.11, and a maximum slope of the sphere variation normalized to the addition along the meridian comprised between 0.9 and 0.11 mm?1. The lens is suited to broadened far vision with a good accessibility to near vision.