Patent ID: 8915589

Claim:
A method for calculating or optimizing and manufacturing a spectacle lens, comprising: obtaining prescription or refraction data V A1 1 and V A1 2 of a spectacles wearer for at least two different object distances A 1 1 and A 1 2 , wherein A 1 1 does not equal A 1 2 , and the prescription data comprises data relating to a spherical power Sph v , a magnitude of an astigmatism Cylv v , and an astigmatism axis Axis v for the at least two different object distances A 1 1 and A 1 2 ; specifying an object distance model A 1 (x, y), wherein A 1 designates the object distance and (x, y) designates a visual spot or visual point of the spectacle lens in a predetermined or predeterminable direction of sight; specifying a function P Ref =ƒ(A 1 ), which describes the dependence of a power vector P Ref = ( M Ref J 0 Ref J 45 Ref ) of the prescription on the object distance A 1 , wherein M Ref = Sph V + Cyl V 2 J 0 Ref = - Cyl V 2 ⁢ cos ⁢ ⁢ 2 ⁢ ⁢ Axis V J 45 Ref = - Cyl V 2 ⁢ sin ⁢ ⁢ 2 ⁢ ⁢ Axis V ; determining the components of the power vector P Ref of the prescription in a plurality of visual points (x, y) on the basis of the object distance model A 1 (x, y) and the obtained prescription data V A1 1 , and V A1 2 ; calculating or optimizing at least one surface of the spectacle lens taking the determined components of the power vector P Ref of the prescription in the visual points (x, y) into account, wherein the calculation or optimization comprises a minimization of a target function Z = ∑ i = 1 N ⁢ ⁢ ( K ⁡ ( Ref , Ast ) - S ⁡ ( Ref , Ast ) ) i 2 , wherein: i, i=1 . . . N designates the i th visual point (x, y) i ; K(Ref, Ast) designates the refractive error Ref and the astigmatic error Ast at the i th visual point of the spectacle lens; and S(Ref, Ast) designates target values for the refractive error Ref and the astigmatic Ast at the i th visual point of the spectacle lens; and manufacturing, based on the calculation or optimization, the at least one surface of spectacle lens.