The present invention describes ophthalmic lens products comprising a multilayer wafer and an injection-molded polycarbonate inner portion. In at least one embodiment, the imaging device includes a radiation source, a detector, a positioning unit and a control unit for controlling the positioning unit and for evaluating the recorded data of the detector. The actuating mechanism includes two plate-shaped operating members and four pins, whereby the pins are so disposed that two pins are connected to one operating member and the distal one of the spring arms, and two pins are connected to the other operating member and the other of the spring arms. The system and method further enable a display of information about an additional variable on the parallel coordinate plot by varying the property of the one or more polygonal lines. This method allows the formation of an etching mask without using a high-cost method such as photolithography. The system includes a retention collar secured to the airway device to define a retention structure, a restraining device adapted to releaseably engage the retention structure and to cooperate therewith to prevent clinically significant movement of the airway device, and means for securing the restraining device to a patient’s head.