摘要:
The invention relates in particular to a computer-implemented method for calculating or optimising a spectacle lens, comprising the following steps: acquiring prescription or refraction data A1(x, y) and V A12 of a spectacle wearer for at least two different object distances A1 1 and A1 2 ( A1 1 ≠ A1 2 ) comprising data regarding the spherical power Sph v , the degree of astigmatism Zyl v and the astigmatism axis Achse v ; predetermining an object distance model AI(x, y), where AI is the object distance and (x, y) denote a visual site or a visual point of the spectacle lens in a predetermined or predeterminable viewing direction; predetermining a function P Ref = ƒ (A1), which describes the dependence of a power vector, formula (I), of the prescription on the object distance A1; determining the components of the power vector P Ref of the prescription in a plurality of visual sites (x, y) on the basis of the object distance model A1(x, y) and the acquired prescription data A1(x, y) and V A12 , calculating or optimising at least one area of the spectacle lens taking into account the determined components of the power vector P Ref of the prescription at the visual sites (x, y).
摘要:
The invention relates to a method for calculating an eyeglass lens design, a method for producing a progressive eyeglass lens, corresponding devices, computer program products, and storage media, and a use of an eyeglass lens. The progressive eyeglass lens design is determined by transforming an initial design. The method comprises the following steps: - defining an initial design, which includes defining the shape of a main line HL and defining at least one desired basic iso-astigmatism line I G having a constant desired basic astigmatism A G = const , wherein the desired basic iso-astigmatism line I G extends through at least one predefined reference point having formula (I); - transforming the initial design, which includes the steps of shifting the first reference point having formula (I) → formula (II) along a predefined or predefinable curve, said first reference point having formula (I) being shifted taking into account design-specific and/or eyeglass wearer-specific data; - the shape of the desired basic iso-astigmatism line I G is modified from I G → I' G in such a way that said line extends through the shifted first reference point having formula (II); and - a desired astigmatism distribution A( u, y ) having the modified desired basic iso-astigmatism line I G is generated or calculated.
摘要:
The invention relates to a progressive spectacle lens comprising two non-spherical surfaces, more particularly two progressive surfaces, which contribute to the enhancement of the effectiveness (addition add) of the long distance vision part to the reading distance part. The invention is characterized in that the sagittas zi = zi (x, y) of at least one (i) progressive surface (i=1,2) are selected in such a way that the sagittas (z) of the respective surface have predetermined values in the edge of the glass spectacles defined by yi = fi1 (x) for y = 0 or. Yi = fi2 (x) for y
摘要:
The invention relates to a spectacle glass and a method for the production of a progressive spectacle glass having at least one progressive surface. The spectacle glass comprises a long distance viewing part with a distance reference point, a close-up viewing part with a close reference point and a progression area located between the distance viewing part and close-up viewing part, wherein the effect of the spectacle glass increases from the value in the distance reference point to the value in the close-up reference point along a main line by a value which is characterized as an addition. The calculation and optimization step of the progressive spectacle glass occurs in such a way that the amount of rotation (I) and/or divergence of a vectoral astigmatism (III) is as small as possible, the amount (IV) of vectoral astigamatism (III) is proportional to the amount and direction of vectoral astigmatism (III) proportional to the axis position of an astigmatism in the position of use of the progressive spectacle glass or a surface astigmatism of the at least one progressive surface of the progressive spectacle glass.