Computer-implemented method for calculating or optimising a spectacle lens comprising the steps: acquiring prescription and refraction data V Al 1 and V Al 2 of a spectacle wearer for at least two different object distances A1 1 and A1 2 (A1 1 ≠ A1 2), wherein the prescription data comprise data relating to the sphere power Sph v, the amount of astigmatism Zyl v and the astigmatism axis Axis v for at least two different object distances A1 1 and A1 2; specifying an object distance model Al(x,y), wherein A1 denotes the object distance and (x,y) denotes a viewing location or a viewing point of the spectacle lens in a predetermined or predeterminable viewing direction; specifying a function P Ref = f ( A 1), which describes the dependence of a power vector P Ref = M Ref J Ref 0 J Ref 45 on the prescription of the object distance A1, wherein M Ref = Sph v + Zyl v 2 J Ref 0 = - Zyl v 2 ⁢ cos 2 ⁢ Axis v J Ref 45 = - Zyl v 2 ⁢ sine ⁢ 2 ⁢ Axis v wherein in a two-dimensional vector space, which is spanned by two components J Ref 0 and J Ref 45 of the power vector P Ref, the transition from a first point with coordinates ( J Ref 0 ( A 1 1), J Ref 45 ( A 1 1)) to a second point with coordinates ( J Ref 0 ( A 1 2), J Ref 45 ( A 1 2)) occurs along the shortest connection between the first and the second point; or wherein in a three-dimensional vector space, which is spanned by the three components M Ref, J Ref 0 and J Ref 45 of the power vector P Ref, the transition from a first point with coordinates ( M Ref ( A 1 1), J Ref 0 ( A 1 1), J Ref 45 ( A 1 1)) to a second point with coordinates ( M Ref ( A 1 1), J Ref 0 ( A 1 2), J Ref 45 ( A 1 2)) occurs along the shortest connection between the first and the second point; determining the components of the power vector P Ref of the prescription in a multiplicity of viewing locations (x,y) on the basis of the object distance model (A1(x,y) and the acquired prescription data V A 1 1 and V A 1 2, calculating or optimising at least one surface of the spectacle lens taking into consideration the determined components of the power vector P Ref of the prescription in the viewing locations (x,y). acquiring prescription and refraction data V Al 1 and V Al 2 of a spectacle wearer for at least two different object distances A1 1 and A1 2 (A1 1 ≠ A1 2), wherein the prescription data comprise data relating to the sphere power Sph v, the amount of astigmatism Zyl v and the astigmatism axis Axis v for at least two different object distances A1 1 and A1 2; specifying an object distance model Al(x,y), wherein A1 denotes the object distance and (x,y) denotes a viewing location or a viewing point of the spectacle lens in a predetermined or predeterminable viewing direction; specifying a function P Ref = f ( A 1), which describes the dependence of a power vector P Ref = M Ref J Ref 0 J Ref 45 on the prescription of the object distance A1, wherein M Ref = Sph v + Zyl v 2 J Ref 0 = - Zyl v 2 ⁢ cos 2 ⁢ Axis v J Ref 45 = - Zyl v 2 ⁢ sine ⁢ 2 ⁢ Axis v wherein in a two-dimensional vector space, which is spanned by two components J Ref 0 and J Ref 45 of the power vector P Ref, the transition from a first point with coordinates ( J Ref 0 ( A 1 1), J Ref 45 ( A 1 1)) to a second point with coordinates ( J Ref 0 ( A 1 2), J Ref 45 ( A 1 2)) occurs along the shortest connection between the first and the second point; or wherein in a three-dimensional vector space, which is spanned by the three components M Ref, J Ref 0 and J Ref 45 of the power vector P Ref, the transition from a first point with coordinates ( M Ref ( A 1 1), J Ref 0 ( A 1 1), J Ref 45 ( A 1 1)) to a second point with coordinates ( M Ref ( A 1 1), J Ref 0 ( A 1 2), J Ref 45 ( A 1 2)) occurs along the shortest connection between the first and the second point; determining the components of the power vector P Ref of the prescription in a multiplicity of viewing locations (x,y) on the basis of the object distance model (A1(x,y) and the acquired prescription data V A 1 1 and V A 1 2, calculating or optimising at least one surface of the spectacle lens taking into consideration the determined components of the power vector P Ref of the prescription in the viewing locations (x,y).