摘要:
Optimizing a spectacle lens by: obtaining prescription or refraction data VA11 and VA12 of a wearer for at least two different object distances A11 and A12 (A11≠A12), comprising data relating to a spherical power Sphv, a magnitude of an astigmatism CylV, and an astigmatism axis AxisV; specifying an object distance model A1(x, y), wherein A1 designates the object distance and (x, y) designates a visual spot or visual point of the spectacle lens in a predetermined direction of sight; specifying a function PRef=ƒ(A1), which describes the dependence of a power vector P Ref = ( M Ref J 0 Ref J 45 Ref ) = ( Sph V + Cyl V 2 - Cyl V 2 cos 2 Axis V J 45 Ref = - Cyl V 2 sin 2 Axis V ) of the prescription on the object distance A1, determining the components of the power vector PRef of the prescription in a plurality of visual points (x, y) on the basis of the object distance model A1(x, y) and the obtained prescription data VA11 and VA12; and calculating at least one surface of the spectacle lens taking the determined components of the power vector PRef of the prescription in the visual points (x, y) into account.
摘要翻译:通过以下方式优化眼镜镜片:针对至少两个不同的对象距离A11和A12(A11≠A12)获得佩戴者的处方或折射数据VA11和VA12,包括与球面光焦度Sphv有关的数据,像散度CylV的大小和 散光轴AxisV; 指定对象距离模型A1(x,y),其中A1表示对象距离,(x,y)表示眼镜在预定方向上的视点或视点; 指定函数PRef =ƒ(A1),其描述功率矢量的依赖性P Ref =(M Ref J 0 Ref J 45 Ref)=(Sph V + Cyl V 2 -C 2 V 2 cos cos 2 2 轴对齐距离A1处的处方的轴V),确定多个视点(x,y)中处方的功率矢量PRef的分量, 基于对象距离模型A1(x,y)和获得的处方数据VA11和VA12; 并且考虑视觉点(x,y)中的处方的功率矢量PRef的确定分量来计算眼镜片的至少一个表面。
摘要:
A method and system for producing a first spectacle lens for a specific situation of wear for correcting at least a first astigmatic refraction of a first eye of a wearer, which has a first cylinder reference axis α0(1) in a reference direction of sight −ez(1) of the first eye. According to the method and apparatus, a primary direction of sight −eζ(1,p) of the first eye for at least one primary evaluation point ib(1,p) of the first spectacle lens is determined and a corresponding primary direction of sight −eζ,k(2,p) of a second eye of the spectacle wearer that corresponds to the primary direction of sight −eζ(1,p) of the first eye in the specific situation of wear is also determined. Furthermore, a first primary merit function for at least one surface of the first spectacle lens is minimized, in which the first primary merit function for the at least one primary evaluation point ib(1,p) of the first spectacle lens takes into account a correction of a first primary transformed astigmatic refraction by the first spectacle lens in the specific situation of wear such that the first primary transformed astigmatic refraction depends on the corresponding primary direction of sight −eζ,k(2,p) of the second eye.
摘要:
A method and apparatus for creating a progressive spectacle lens design by transforming a starting design. The starting design is defined to include specifications for the course of a principal line and specification of at least one base target isoastigmatism line with a constant base target astigmatism, in which the base target isoastigmatism line passes through a first predetermined control point {right arrow over (r)}1=(u1,y1). The method and apparatus transform the starting design by shifting the first control point {right arrow over (r)}1=(u1,y1) along a predetermined or predeterminable curve, taking into account the design and/or the spectacle lens wearer-specific data; modifying the course of the base target isoastigmatism line such that it passes through the shifted first control point {right arrow over (r)}′1(u′1,y′1); and calculating a target astigmatism distribution A(u,y), which exhibits the modified base target isoastigmatism line. Furthermore, the method and apparatus are provided to create the spectacle lens on the basis of the progressive spectacle lens design.
摘要:
A method and system for producing a first spectacle lens for a specific situation of wear for correcting at least a first astigmatic refraction of a first eye of a wearer, which has a first cylinder reference axis α0(1) in a reference direction of sight −ez(1) of the first eye. According to the method and apparatus, a primary direction of sight −eζ(1,p) of the first eye for at least one primary evaluation point ib(1,p) of the first spectacle lens is determined and a corresponding primary direction of sight −eζ,k(2,p) of a second eye of the spectacle wearer that corresponds to the primary direction of sight −eζ(1,p) of the first eye in the specific situation of wear is also determined. Furthermore, a first primary merit function for at least one surface of the first spectacle lens is minimized, in which the first primary merit function for the at least one primary evaluation point ib(1,p) of the first spectacle lens takes into account a correction of a first primary transformed astigmatic refraction by the first spectacle lens in the specific situation of wear such that the first primary transformed astigmatic refraction depends on the corresponding primary direction of sight −eζ,k(2,p) of the second eye.
摘要:
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.
摘要:
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.
摘要:
The invention relates to a method of producing a single-strength spectacle lens while taking into account an individual spectacle wearer's data, the single-strength spectacle lens having a rotationally symmetrical base surface and a rotationally symmetrical aspherical or atoric prescription surface, comprising the following steps: Acquisition of an individual spectacle wearer's data; selection of a spectacle lens blank with a predetermined base surface from a group of spectacle lens blanks; and calculation and optimization of the prescription surface while taking into account at least a part of the individual spectacle wearer's data in addition to an adaptation of the dioptric effect by the prescription surface to the spectacle wearer's prescription. The invention also relates to a corresponding system for producing a single-strength spectacle lens and to an individual single-strength spectacle lens.
摘要:
A progressive spectacle lens having two aspherical and in particular progressive surfaces, i.e. surfaces contributing to the rise in the effect (addition Add.) from the distance vision portion to the near vision portion, in which the sagittal heights zi=zi(x,y)of at least one (i) progressive surface (i=1,2) are chosen such that the sagittal height z of this respective surface at the edge of the spectacle lens given by yi=fi1(x) for y≧0 and yi=fi2(x) for y
摘要:
A monofocal ophthalmic lens having a front and a rear surface, each of which is aspherical, of which at least one surface has identical radii of principle curvature in the apex. The average surface refracting power of at least one of the front and rear surfaces is defined by the formula: Bf=(n−1)/2*(1/R1+1/R2) wherein n: is the refractive index of the lens medium, R1: is the radius of principle curvature 2 in a point of at least one of the front and rear surfaces in a first principle plane, and R2: is the radius of principle curvature 2 in the point of the at least one in the front and rear surfaces in a second principle plane, and wherein the average surface refracting power of points on the at least one of the front and rear surfaces is the function of the distance h at constant azimuthal angle of &OHgr; of each point from the apex, and the function includes an extreme value and/or a value 0.
摘要:
A progressive ophthalmic lens including at least one distant vision zone in which the power is suitable for distant viewing, at least one near vision zone in which the power is suitable for near viewing, and at least one progression zone in which the power varies continuously from the power of the distant vision zone to the power of the near vision zone along a principal line, at least one surface of the ophthalmic lens contributing to the power variation. A surface astigmatism of the at least one of surface of the ophthalmic lens contributing to the power variation along at least one horizontal intersection, represented by an intersection of the ophthalmic lens and a horizontal plane where y=const, has a local maximum value located at a distance of not more than 4 mm from the principal line, and at least one local minimum value which does not lie on the principal line and is located at a greater distance from the principal line than the local maximum value.