Abstract: A pair of progressive ophthalmic lenses (1, 2) meets special conditions for improving binocular vision of a wearer, while avoiding discomfort for peripheral vision. A first one of the conditions relates to width values of far vision fields and/or proximate vision fields, for indicating that the fields are different enough in width between both lenses. A second one of the conditions sets a maximum value for the relative difference in mean refractive power gradient between both lenses.

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 pair of progressive ophthalmic lenses (1, 2) meets special conditions for improving binocular vision of a wearer, while avoiding discomfort for peripheral vision. A first one of the conditions relates to height values of far vision fields, intermediate vision fields and/or proximate vision fields, for indicating that the fields are different enough in height between both lenses. A second one of the conditions sets a maximum value for the relative difference in mean refractive power gradient between both lenses.

Abstract: Ophthalmic lens having a first surface comprising a zone of optical interest, the zone of optical interest comprising at least: a far vision control point (FV), a near vision control point (NV), a main line (M) starting from one end of the zone of optical interest, ending on the opposite end of the zone of optical interest and passing through the far and near vision control points, wherein the main line (M) comprises at one end a first section (S1) of continuous increase of mean sphere, at the other end a second section (S2) of continuous increase of mean sphere, the first and second section being separated by a third section (S3) of stabilized mean sphere.

Abstract: A multifocal ophthalmic lens, comprising a far vision (“FV”) area and a near vision (“NV”) area. When a value attained by subtracting the refractive power of said FV area from the refractive power of said NV area is an addition power Add, an average surface power D11 of said FV area and an average surface power D12 of the NV area of a surface on a side of the object (“front surface”), and an average surface power D21 of said FV area and an average surface power D22 of a surface on a side of the eye (“back surface”), satisfy the relationship D21?D22=Add?(D12?D11), wherein D11 and D12 satisfy the relationship D12-D11>Add, wherein said front surface has a toric component with a cylinder value greater than 0.25 D in modulus; and wherein said front surface has an inflection point and/or a plateau.

Abstract: The invention relates to a method of determining an ophthalmic lens for a wearer's eye, the method comprising the following steps: measurement, on the wearer in binocular vision, of the three-dimensional coordinates of the centre of rotation (COR) of the wearer's eye; measurement (10) of at least one viewing direction in a natural posture; determination of the desired position of the ophthalmic lens; calculation of the characteristics of the ophthalmic lens using the measured coordinates and the determined position and the measured direction in the natural posture. Measuring the position of the centre of rotation of the eye in binocular vision ensures that the lens obtained is best adapted for the wearer.

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

Abstract: A system for the supply of ophthalmic lenses and related methods for providing ophthalmic lenses for enhanced experience based on right-handedness and left-handedness.

Abstract: A method implemented by computer means for determining a virtual wearer-ophthalmic lens-ergorama system associated with an optical function of an ophthalmic lens for a given wearer, comprising: a prescription data providing step, an optical reference surface data providing step, a virtual wearer-ophthalmic lens-ergorama system determining step, a criteria selecting step, a target value defining step, an evaluation step, and a modification step, in which at least one parameter of the virtual wearer-ophthalmic lens-ergorama system different from the base curve of the ophthalmic lens is modified, in order to minimize the difference between the target value and the evaluation criterion value.

Abstract: The invention relates to a finished or semi-finished lens which comprises: a disc containing all the points of the lens that have the same abscissa and the same ordinate as points located within a circle in the reference plane having a diameter of 30 millimeters and centered on the prism reference point; a progression length of less than 14.5 millimeters; a first specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the nasal area and in the disc; and a second specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the temporal area and in the disc; a first ratio between: the maximum gradient of the cylinder for the points of the lens that have the same abscissa and the same ordinate as the points located on segments connecting the mounting cross to the first and second specific points, and surface addition of less than 0.

Abstract: A process for designing an ophthalmic progressive eyeglass comprises providing an initial front surface and an initial back surface. Respective addition values of front and back surfaces of the eyeglass are varied based on said initial front and back surfaces using a surface derivation tool. These surface addition values are selected so that the eyeglass exhibits an eyeglass addition value which matches a wearer's prescription and a value for a design feature which matches a target value. Said target value may be used for customizing the ophthalmic progressive eyeglass. The process does not require point-to-point surface optimization.

Abstract: A spectacle eyeglass of progressive addition type has been designed for myopic children. To this purpose, an ergorama has been constructed, taking into account vision conditions encountered by the children in their everyday life. In particular, the eyeglass has a limited optical power increase between two reference eye directions (D1, D2), a start (D0) of the optical power increase which is located quite low in the eyeglass, and an offset value (OS) for a meridian line (ML) which is higher than that of eyeglasses designed for adults.

Abstract: Implementations described and claimed herein provide a complex surface of a progressive multifocal ophthalmic lens. In one implementation, the complex surface includes: a difference in ratio between cylinder value and surface addition less than 0.2 in absolute value; a first ratio between a maximum cylinder value for all points in a grouping circle and a surface addition; and a second ratio between a maximum cylinder value for all points on a disc and a surface addition. In another implementation, the complex surface includes: a difference in ratio between resultant astigmatism value and prescribed addition less than 0.3 in absolute value; a first ratio between a value of resultant astigmatism for all directions of gaze passing through an angular circle and a surface addition; and a second ration between a value of resultant astigmatism for all directions of gaze passing inside the angular circle and a prescribed addition.

Abstract: The invention relates to a method for determining an ophthalmic lens for a person (i.sub.1, i.sub.2, i.sub.3) to wear said lens, comprising the following steps: i) determination of the size (T.sub.1, T.sub.2, T.sub.3) or height of the eyes (H.sub.1, H.sub.2, H.sub.3) of the person to wear the lens; and ii) calculation of at least one characteristic of the ophthalmic lens according to the size (T.sub.1, T.sub.2, T.sub.3) or the height of the eyes (H.sub.1, H.sub.2, H.sub.3) of the person to wear the lens. The ophthalmic lens can be progressive strength or unifocal. The invention also relates to an optimization method and a method for producing an ophthalmic lens implementing such a definition method. The invention further relates to a set of lenses having at least one characteristic that depends on the size and the height of the eyes of the person to wear the lens.

Abstract: A method for determining the value of the inset of a progressive addition lens according to a wearer comprising the steps of: providing convergence data, determining from the convergence data the inset of the progressive addition lens considering at least the convergence data and the prismatic effect of the progressive addition lens.

Abstract: The invention relates to a method for determining an aspherization layer for an ophthalmic lens for a wearer for whom a power and an astigmatism have been prescribed. The method can be used equally satisfactorily on a unifocal or a multifocal lens. The invention also extends to the method for determining an ophthalmic lens from an aspoherization layer obtained by the method. The invention improves the optical performance of lenses obtained from semi-finished lenses in which the complex surface is unknown.

Abstract: An ophthalmic lens including: a prescription control point (P); an upper area having, relative to the point (P), and average-power continuous variation ?PuiSup that is monotonous between the point (P) and the point (Psup) (maximum variation point in absolute value) where the signed value of the variation ?PuiSupMax=Pui(Psup)?Pui(P) is between ?0.1 and ?0.4 dioptres; a lower area having, relative to the point (P), an average power continuous variation ?Puinf that is monotonous between the point (P) and the point (Pinf) (maximum variation point in absolute value) where the signed value of the variation ?PuiinfMax=Pui(Pinf)?Pui(P) is between +0.1 and +0.4 dioptres; the average power gradient being lower than 4.10?2×?Puitotal, where ?Puitotal=|?PuisupMax|+?PuiInfMax. Such a lens advantageously takes the accommodative dynamics of the eye into account and increases the visual comfort of the wearer.

Abstract: The invention relates to a lens having certain properties, including: a circle grouping together all the points of the lens having the same abscissa and the same ordinate as points located on a circle in the reference plane, having a diameter of 35 millimetres and centred on a point located 8.5 millimetres below the mounting cross and horizontally offset on the nasal side by 1.25 millimetres; a disc grouping together all the points of the lens having the same abscissa and the same ordinate as points located inside said circle; a progression length of less than 14.5 millimetres; a ratio difference between the value of the cylinder and the surface addition of less than 0.

Abstract: A method of calculating an optical system (OS) of an ophthalmic lens according to a given spectacle frame comprising the steps of: providing geometrical data of the spectacle frame, providing wearer data, and optimization of the optical system (OS) according to at least the criteria consisting of the geometrical data of the spectacle frame, the wearer data and at least one positioning data, so as to generate at least two optical surfaces (S1, S2).

Abstract: The invention relates to a finished or semi-finished lens which comprises: a disc containing all the points of the lens that have the same abscissa and the same ordinate as points located within a circle in the reference plane having a diameter of 30 millimetres and centred on the prism reference point; a progression length of less than 14.5 millimetres; a first specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the nasal area and in the disc; and a second specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the temporal area and in the disc; a first ratio between: the maximum gradient of the cylinder for the points of the lens that have the same abscissa and the same ordinate as the points located on segments connecting the mounting cross to the first and second specific points, and surface addition of less than 0.