An autoclavable and sterilent-resistant ophthalmoscopy lens system having a plastic contact lens, and at least one image forming lens element. A decoder receives the bitstream and decodes a portion thereof to obtain at least a portion of a predictive reference frame. The needle is an atraumatic needle splittable along its length but remains hinged together by the needle tip itself. The information provided may include that the compressor is outside of a specific safety parameter, so that the controller knows not only that a safety parameter has been traversed, but exactly which one.