Method for an automated in-line determination of the center thickness of an ophthalmic lens in an automated manufacturing line for ophthalmic lenses, the method comprising the steps of: - providing an ophthalmic lens having a front surface, a back surface and a center thickness; - providing an interferometer comprising a light source, a focusing probe and a detector; - determining the center thickness of the ophthalmic lens from the signals generated at the detector by the light reflected at the respective boundary (510;500,502) at the back surface and at the front surface of the ophthalmic lens; - providing an inspection cuvette containing the ophthalmic lens immersed in a liquid, characterized by: the inspection cuvette comprising an optically transparent bottom having a concave inner surface; - positioning the inspection cuvette at a first inspection location of an inspection module of the automated manufacturing line; - focusing light coming from the light source to a set position of the ophthalmic lens at the center of the concave inner surface of the optically transparent bottom of the inspection cuvette by means of the focusing probe, the focusing probe further directing the light reflected at the boundary between the back surface of the ophthalmic lens and the liquid on the one hand as well as the light reflected at the boundary between the front surface of the ophthalmic lens and the liquid or the light reflected at the boundary between the front surface of the ophthalmic lens and the concave inner surface of the optically transparent bottom of the inspection cuvette on the other hand to the detector of the interferometer, wherein the step of determining the center thickness of the ophthalmic lens comprises - counting the number of signals generated by the light reflected at the respective boundary (510;500,502), and - for a counted number of two signals, selecting the two signals for determining the center thickness of the ophthalmic lens, - for a counted number of three signals, ignoring the signal corresponding to the light reflected at the boundary between the concave inner surface of the optically transparent bottom of the inspection cuvette and the liquid, and selecting the remaining two signals for determining the center thickness of the ophthalmic lens. - providing an ophthalmic lens having a front surface, a back surface and a center thickness; - providing an interferometer comprising a light source, a focusing probe and a detector; - determining the center thickness of the ophthalmic lens from the signals generated at the detector by the light reflected at the respective boundary (510;500,502) at the back surface and at the front surface of the ophthalmic lens; - providing an inspection cuvette containing the ophthalmic lens immersed in a liquid, characterized by: the inspection cuvette comprising an optically transparent bottom having a concave inner surface; - positioning the inspection cuvette at a first inspection location of an inspection module of the automated manufacturing line; - focusing light coming from the light source to a set position of the ophthalmic lens at the center of the concave inner surface of the optically transparent bottom of the inspection cuvette by means of the focusing probe, the focusing probe further directing the light reflected at the boundary between the back surface of the ophthalmic lens and the liquid on the one hand as well as the light reflected at the boundary between the front surface of the ophthalmic lens and the liquid or the light reflected at the boundary between the front surface of the ophthalmic lens and the concave inner surface of the optically transparent bottom of the inspection cuvette on the other hand to the detector of the interferometer, wherein the step of determining the center thickness of the ophthalmic lens comprises - counting the number of signals generated by the light reflected at the respective boundary (510;500,502), and - for a counted number of two signals, selecting the two signals for determining the center thickness of the ophthalmic lens, - for a counted number of three signals, ignoring the signal corresponding to the light reflected at the boundary between the concave inner surface of the optically transparent bottom of the inspection cuvette and the liquid, and selecting the remaining two signals for determining the center thickness of the ophthalmic lens.