Computer-implemented method for generating or calculating a design for a progressive spectacle lens comprising the steps: • defining a starting design comprising: ∘ specification of a principal line (40; 70); ∘ specifications for base astigmatism values A(u = 0,y) along the principal line (40, 70); and ∘ specifications for the course of at least one base target isoastigmatism line u G (y) (10, 10'; 50, 50'), wherein the base target isoastigmatism line (10, 10'; 50, 50') runs through a first predetermined or predeterminable control point r 1 = (u 1, y 1); • transforming the starting design, wherein transforming of the starting design comprises: ∘ modifying the course of the base target isoastigmatism line (10, 10'; 50, 50') u G (y) → u' G (y); and ∘ calculating the target astigmatism values A(u, y) of the design to be calculated by means of an interpolation between the target astigmatism values A(u = 0,y) on the principal line (40, 70) and the target astigmatism values A(u' G (y), y) on the modified base target isoastigmatism line (101 101'; 501, 501') wherein modifying the course of the base target isoastigmatism line (10, 10'; 50, 50') comprises the steps: • shifting the first control point r 1 → r ' 1 ( u' 1, y' 1) along a predetermined or predeterminable curve; and • calculating the modified base target isoastigmatism line (101 101'; 501, 501') in such a manner that this runs through the shifted first control point r ' 1 ( u' 1, y ' 1), and wherein u denotes the horizontal distance of a point ( x, y) of the spectacle lens design from the principal line (40; 70); y the vertical coordinate of the point ( u, y) of the spectacle lens design; u G (y) the horizontal distance of a point ( u G (y), y) on the base target isoastigmatism line (10, 10'; 50, 50') from the principal line (40; 70); u' G ( y) the horizontal distance of a point ( u' G ( y), y) on the modified base target isoastigmatism line (101, 101'; 501, 501') from the principal line (40; 70). • defining a starting design comprising: ∘ specification of a principal line (40; 70); ∘ specifications for base astigmatism values A(u = 0,y) along the principal line (40, 70); and ∘ specifications for the course of at least one base target isoastigmatism line u G (y) (10, 10'; 50, 50'), wherein the base target isoastigmatism line (10, 10'; 50, 50') runs through a first predetermined or predeterminable control point r 1 = (u 1, y 1); ∘ specification of a principal line (40; 70); ∘ specifications for base astigmatism values A(u = 0,y) along the principal line (40, 70); and ∘ specifications for the course of at least one base target isoastigmatism line u G (y) (10, 10'; 50, 50'), wherein the base target isoastigmatism line (10, 10'; 50, 50') runs through a first predetermined or predeterminable control point r 1 = (u 1, y 1); • transforming the starting design, wherein transforming of the starting design comprises: ∘ modifying the course of the base target isoastigmatism line (10, 10'; 50, 50') u G (y) → u' G (y); and ∘ calculating the target astigmatism values A(u, y) of the design to be calculated by means of an interpolation between the target astigmatism values A(u = 0,y) on the principal line (40, 70) and the target astigmatism values A(u' G (y), y) on the modified base target isoastigmatism line (101 101'; 501, 501') ∘ modifying the course of the base target isoastigmatism line (10, 10'; 50, 50') u G (y) → u' G (y); and ∘ calculating the target astigmatism values A(u, y) of the design to be calculated by means of an interpolation between the target astigmatism values A(u = 0,y) on the principal line (40, 70) and the target astigmatism values A(u' G (y), y) on the modified base target isoastigmatism line (101 101'; 501, 501') • shifting the first control point r 1 → r ' 1 ( u' 1, y' 1) along a predetermined or predeterminable curve; and • calculating the modified base target isoastigmatism line (101 101'; 501, 501') in such a manner that this runs through the shifted first control point r ' 1 ( u' 1, y ' 1), u denotes the horizontal distance of a point ( x, y) of the spectacle lens design from the principal line (40; 70); y the vertical coordinate of the point ( u, y) of the spectacle lens design; u G (y) the horizontal distance of a point ( u G (y), y) on the base target isoastigmatism line (10, 10'; 50, 50') from the principal line (40; 70); u' G ( y) the horizontal distance of a point ( u' G ( y), y) on the modified base target isoastigmatism line (101, 101'; 501, 501') from the principal line (40; 70).