Method for measuring the local refractive power of a left and/or a right spectacle lens in a spectacle frame , including a step of capturing at least one first image representation of a scene with many structure points and with a left and/or a right spectacle lens in the spectacle frame by means of at least one image capture device from at least one first recording position with at least an imaging beam path for each of these structure points , said imaging beam path passing through the left and/or the right spectacle lens , including a step of capturing at least two further image representations of the scene without the left and/or the right spectacle lens of the spectacle frame or without the spectacle frame containing the left and/or the right spectacle lens with the structure points imaged in the first image representation by means of the at least one image capture device from at least two different recording positions , one of which can be identical to the first recording position ; and including a step of calculating the coordinates of the structure points in a coordinate system from the at least two further image representations of the scene by means of image evaluation by means of triangulation, characterized by a step of determining a local refractive power of the left spectacle lens and/or of the right spectacle lens from the coordinates of the structure points and the image of the structure points in the at least one first image representation of the scene by means of an inverted approach, in which the optical interfaces of the left and/or right spectacle lens are calculated from the imaging beam paths for the structure points by virtue of the variation of the interface to be determined in each case leading to a minimization of an error term, the error term being determined for the interface by virtue of ray tracing being used to create a comparison of beam points upstream and downstream of the interface. including a step of capturing at least one first image representation of a scene with many structure points and with a left and/or a right spectacle lens in the spectacle frame by means of at least one image capture device from at least one first recording position with at least an imaging beam path for each of these structure points , said imaging beam path passing through the left and/or the right spectacle lens , including a step of capturing at least two further image representations of the scene without the left and/or the right spectacle lens of the spectacle frame or without the spectacle frame containing the left and/or the right spectacle lens with the structure points imaged in the first image representation by means of the at least one image capture device from at least two different recording positions , one of which can be identical to the first recording position ; and including a step of calculating the coordinates of the structure points in a coordinate system from the at least two further image representations of the scene by means of image evaluation by means of triangulation, characterized by a step of determining a local refractive power of the left spectacle lens and/or of the right spectacle lens from the coordinates of the structure points and the image of the structure points in the at least one first image representation of the scene by means of an inverted approach, in which the optical interfaces of the left and/or right spectacle lens are calculated from the imaging beam paths for the structure points by virtue of the variation of the interface to be determined in each case leading to a minimization of an error term, the error term being determined for the interface by virtue of ray tracing being used to create a comparison of beam points upstream and downstream of the interface. <EOS>