1. A visual prosthesis comprising: a camera suitable to be external to the body; a video processing unit receiving video data from the camera and producing stimulation codes indicating electrode patterns to be presented; the video processing unit including a zoom component and a pattern detection component; a wireless transmitter receiving codes from the video processing unit and transmitting the codes; an implantable wireless receiver suitable to be implanted within a body receiving the codes from the wireless transmitter; an implantable signal generator receiving the codes from the wireless receiver and generating stimulation signals; an implantable electrode array receiving the stimulation signals and suitable to stimulate visual neural tissue wherein the zoom component and the pattern detection component are operable together to zoom out and provide an indication of the location of a pattern in a zoomed out image.