Maschinendrehpunkt(the intersection of the vertical and horizontal midlines of the rectangle, in which the peripheral outline of the prescription lens is inscribed)
Scheibenmittelpunkt(the intersection of the vertical and horizontal midlines of the rectangle, in which the peripheral outline of the prescription lens is inscribed)
geometrischer Mittelpunkt des Brillenglases(the intersection of the vertical and horizontal midlines of the rectangle, in which the peripheral outline of the prescription lens is inscribed)
Formscheibendrehpunkt(the intersection of the vertical and horizontal midlines of the rectangle, in which the peripheral outline of the prescription lens is inscribed)