Abstract: A method for determining the inversion state of a soft contact lens which is arranged in an interior space of an inspection cuvette comprises the steps of: through the viewing glass obtaining a dark-field image of the soft contact lens arranged in the interior space along the optical axis; identifying a lens edge of the soft contact lens in the dark-field image; determining one characteristic values representative of the brightness of a portion of the lens edge in the dark-field image; comparing one of the characteristic values with a corresponding predetermined threshold value; and determining that the soft contact lens is inverted in case the characteristic values is equal to or above the corresponding predetermined threshold value.