A medical WFOV optical-tracking-system for determining the position and orientation of a target-object. The system includes a light-emitter attached the target-object and least two light-emitters attached to a display and two Wide-Field-Of-View optical-detectors attached to the target-object, A selected one being operative to be an active Wide-Field-Of-View optical -detector which acquires an image of the two light-emitters. Each Wide-Field-Of-View optical-detector including an optical-sensor and at least two optical-receptors. The system further includes another optical-detector attached to the display, and acquires at least one image of the light-emitter attached to the target-object. A processor, determining the position arid orientation the target-object, and renders medical information, A display displays the rendered medical information at a position and orientation corresponding to the determined position and orientation of the target-object.
