A visual prosthesis and a method of operating a visual prosthesis are disclosed. An emitter follower unit drives the amplifier element at a constant voltage corresponding to a reference voltage supplied to a reference terminal from outside. A plurality of wrinkles are formed on an inner peripheral surface of the tubular body 2 for preventing the sliding movement of the grip portion 5 within the tabular body 2. The software program preferably takes the onomastic elements from the selected name and compares the onomastic elements to the one or more databases. The inventive blanket includes an arrangement of seam structures defining channels housing substantially discrete elongate heating and sensing elements arranged in a substantially similar pattern within the blanket interior. Engagement portions on the tools are clamped by the clamping blocks comprising a connector assembly; the tools may be C-clamps, bar-clamps, pipe-clamps, coupling devices, brackets, standoffs, and like implements.