Abstract: A method of calculating an individual progressive lens creates one or more basic designs for lenses based on theoretical specifications, and then creates starting designs from these basic designs. Individual progressive lenses are calculated from the starting designs corresponding to the individual data from wearing test subjects. Valid starting designs are then created fr production. The individual lenses are calculated from the starting designs according to individual customer data.

Abstract: A method of producing a progressive spectacle glass by defining an ordering value for the average use value in the far reference point of the progressive spectacle glass, calculating the progressive spectacle glass while taking into account a calculation value of the average use value in the far reference point, the calculation value having a negative desired refraction deviation between 0.03 dpt and 0.2 dpt with respect to the ordering value in the far reference point, and producing the calculated progressive spectacle glass.

Abstract: A double-progressive spectacle lens in which the progressive action is distributed over the front and rear surfaces of the double-progressive spectacle lenses and described by the quotient Q Q=Addvfl/AddGesamt where Addvfl represents the increase in the surface dioptric power along the principal line on the front surface between the distance area and the near area, and ADDGesamt represents the increase in the total dioptric power along the principal line between the distance area and the near area, and the fraction Q increases with growing distance area effect F: ? Q ? ( F ) ? F ? 0.

Abstract: An ophthalmic lens and a method for producing a progressive ophthalmic lens having at least one progressive surface, where by a calculation and optimization step in the production of the progressive lens is performed. The absolute value of the rotation |rot {right arrow over (A)}| and/or the divergence |div {right arrow over (A)}| of a vectorial astigmatism {right arrow over (A)} is as small as possible, and the absolute value |{right arrow over (A)}| of the vectorial astigmatism {right arrow over (A)} is proportional to the absolute value of an astigmatism in the use position of the progressive lens. The direction of the vectorial astigmatism {right arrow over (A)} is proportional to the axial position of an astigmatism in the use position of the progressive lens or a surface astigmatism of the at least one progressive surface of the progressive lens.

Abstract: A method of optimizing a progressive lens is described. This invention is characterized by the following steps: selecting a preset progressive lens having a preset object distance function A1(x,y), selecting an object distance function A2(x=x0,y) along the main line of vision of the preset progressive lens for a lens that is to be derived, locating the map U:y?y? along the main line of vision, such that the value y? for which the following holds is calculated for each value of y: A1(x=x0,y)=A2(x=x0,y?), calculating the setpoint values S(x,y) at S(x,y?)=S(x,U(y)).

Abstract: A double progressive spectacle lens having a prefabricated progressive surface and a second progressive surface for correcting a spherical ametropia or a cylindrical ametropia, in which the surface properties of the progressive surface in the vicinity of the principal line of sight are asymmetric, the asymmetry being determined by the symmetry factor SA, which is determined in relation to the level A by the ratio of the smaller to the larger horizontal distance between the principal line of sight and the location at which the surface astigmatism in the horizontal section reaches the value A [dpt].

Abstract: A double progressive spectacle lens is described. The invention is distinguished in that at least one of the two progressive surfaces has at least one of the following properties: principal line of sight a) the profile of the surface power along the principal line of sight in the progression channel is not monotonic between y=?15 mm and y=+10 mm, b) the profile of the surface astigmatism along the principal line of sight has at least two clearly expressed maxima that are at least 0.

Abstract: A pair of spectacle lenses in which one spectacle lens is designed for distance vision or near vision, and the second spectacle lens is designed for another object distance.

Abstract: A unifocal spectacle lens with an aspheric and/or atoric surface, or a progressive spectacle lens, in which the unifocal spectacle lens or the progressive spectacle lens has small higher order aberrations.

Abstract: A method for representing and optimizing a double-progressive spectacle lens is characterized by the following steps: selecting a suitable coordinate system K2 for the representation of a back surface; selecting a suitable grid G for the representation of a spline of the back surface of a starting lens to be optimized in a coordinate system K2; assigning sagittal height data of the back surface to a spline (back surface spline); defining a position of a center of rotation of an eye; computing principal rays from the center of rotation of the eye through the starting lens at grid points of G; computing a length of a distance between points of penetration of a thus computed principal ray through a front surface and the back surface (oblique thickness); assigning data of the oblique thickness (thickness spline) to a spline; selecting a set of assessment positions at which an optical quality is computed for a target function; suitably selecting particular optical and geometrical stipulations which ideally should

Abstract: A method of optimizing a progressive lens is described. This invention is characterized by the following steps: selecting a preset progressive lens having a preset object distance function A1(x,y), selecting an object distance function A2(x=x0,y) along the main line of vision of the preset progressive lens for a lens that is to be derived, locating the map U:y?y? along the main line of vision, such that the value y? for which the following holds is calculated for each value of y: A1(x=x0,y)=A2(x=x0,y?), calculating the setpoint values S(x,y) at S(x,y?)=S(x,U(y)).

Abstract: A double progressive spectacle lens having a prefabricated progressive surface and a second progressive surface for correcting a spherical ametropia or a cylindrical ametropia, in which the surface properties of the progressive surface in the vicinity of the principal line of sight are asymmetric, the asymmetry being determined by the symmetry factor SA, which is determined in relation to the level A by the ratio of the smaller to the larger horizontal distance between the principal line of sight and the location at which the surface astigmatism in the horizontal section reaches the value A [dpt].

Abstract: A double-progressive spectacle lens in which the progressive action is distributed over the front and rear surfaces of the double-progressive spectacle lenses and described by the quotient Q Q=Addvfl/AddGesamt where Addvfl represents the increase in the surface dioptric power along the principal line on the front surface between the distance area and the near area, and ADDGesamt represents the increase in the total dioptric power along the principal line between the distance area and the near area, and the fraction Q increases with growing distance area effect F: ? Q ? ( F ) ? F ? 0.

Abstract: A pair of spectacle lenses in which one spectacle lens is designed for distance vision or near vision, and the second spectacle lens is designed for another object distance.

Abstract: A method for optimizing an atoroidal surface of an optical lens, in particular a spectacle lens, having at least one plane of symmetry is characterized by a combination of the following features: dividing the atoroidal surface having at least one plane of symmetry into at least two regions separated by the at least one plane of symmetry; representing one of the separate regions (represented region) of this surface by a set of coefficients of B spline functions; computing sagittal heights of the represented region by B spline interpolation; computing sagittal heights in at least one other region by mirroring coefficients or coordinates at the at least one plane of symmetry; and optimizing the atoroidal surface only by varying the set of B spline coefficients of the represented region.

Abstract: A method is provided for demonstrating an effect of a particular spectacle frame and of optical lenses fitted into this spectacle frame on the appearance of a spectacles wearer as it would be perceived by another person (virtual observer). An image of a face of the spectacles wearer is prepared in such manner that the image can be processes in a computer. An arrangement of the respective spectacle frame in front of the eyes is determined. The image of the face is projected onto a plane by a computation (ray-tracing) of principal rays passing through a center of rotation of an eye of the (virtual) observer to produce a planar image of the face in this plane.

Abstract: A spectacle lens is provided with a region (distance portion) designed for viewing at greater distances and, in particular, “to infinity”, a region (near portion) designed for viewing at short distances and, in particular, “reading distances”, and a progression zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from the value in the distance reference point located in the distance portion to the value at the near reference point located in the near portion along a line (principal meridian) curving towards the nose. The invention is marked by specific conditions for the astigmatic deviation and/or the mean “as worn” power being observed.

Abstract: A unifocal spectacle lens with an aspheric and/or atoric surface, or a progressive spectacle lens, in which the unifocal spectacle lens or the progressive spectacle lens has small higher order aberrations.

Abstract: A spectacle lens comprises a region (distance portion) designed for viewing at large distances and in particular “to infinity”; a region (near portion) designed for viewing at short distances and in particular “reading distances”; and a progressive zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at the near reference point located in the near portion along a curve (principal line) veering towards the nose. The invention is distinguished by a combination of the following features: a change of magnification with a direction of sight is small; the magnification increases radially, starting from the distance reference point; the difference between the magnifications at the distance and near reference points is small.

Abstract: A progressive power spectacle lens in which a progressive length is less than or equal to 12 mm and width of the distance portion in a horizontally meridian y=+7 mm in dependence on power and addition power is larger than the values given in the following Table: Sph = −6.0 dpt −2.5 dpt 0.5 dpt 3.0 dpt 5.0 dpt Addition 47 mm 55 mm 60 mm 60 mm 60 mm Power = 1.0 Addition 34 mm 36 mm 34 mm 29 mm 35 mm Power = 2.0 Addition 26 mm 27 mm 25 mm 22 mm 23 mm Power = 3.0.