A hearing aid system including an implantable device, and a surgical instrument for enabling a physician to install the implant in a patient’s body in a simple office procedure using only local anesthesia. Intensities of the infrared light absorbed in the first material and the dopants are computed according to light wave numbers by utilizing a difference between intensities of the infrared light before and after transmitting the substrate and layer and by utilizing a difference between intensities of the infrared light absorbed in the substrate and layer and absorbed in only the substrate. After proceeding a photolithography process, developing processes, the cathode ramparts and the insulating layer are formed simultaneously and the first display electrodes are exposed partially. The head gear assembly has a passageway that fluidly connects together, the upper opening, the array and the front opening. In the event the output slot is blocked, the guideway is adapted to guide at least a portion of the substrate into the substrate receiving opening so that at least the portion of the substrate loops into the substrate receiving opening, thereby preventing a jam. A lens surface is formed in the melted chalcogenide glass to form a molded lens which is bonded to the top surface of the preformed lens.