A dual-media network interface includes a physical layer device. The epoxy is then cured to different indexes of refraction that provide precise corrections for the patient’s wavefront aberrations. The nozzles accelerate the exhaust flow from the exhaust stacks, provide a means for measuring the flow from the exhaust stacks, yet maintain the mass flow rates from the exhaust stacks at predetermined levels. At each intersection another waveguide is formed above the input and output waveguides. Following implantation into the patient’s body, the first and second portions of the sheath are removable from the first and second ends of the tape respectively. The polyester film is produced by irradiating UV light onto a surface of a film in a non-stretched stage or a stage prior to the completion of stretching to form fine protrusions on the surface.