DEVICE AND METHOD FOR DETERMINING A TORSION OF A SPECTACLE FRAME

The invention relates to a device (1) for determining a torsion of a spectacle frame (B), wherein two lenses (G1, G2) are arranged in the spectacle frame (B), having: * a laser-supported device (L; L1, L2) for generating lighting patterns on at least one of the lenses, said laser-supported device being designed to generate a first lighting pattern (L1) and a second lighting pattern (L2) at a distance to each other, wherein the laser has a wavelength which is at least partly reflected by the type of lens used for the lenses, and at least one first part of the lighting pattern is generated on the first lens (G1) and a second part of the same lighting pattern is generated on the second lens (G2), * a receiving device (K) which is designed to receive a reflection of the lighting patterns (L1, L2) in order to determine the distance between each reflection point along the lighting pattern, and * an evaluation device (C) which determines the presence of a torsion on the basis of the measured reflection points of the first lighting pattern (L1) and the second lighting pattern (L2). A torsion is present if the distances from the first lens (G1) to the second lens (G2) for the first lighting pattern and the second lighting pattern are not substantially identical.