contact lenses. The team has been successfully testing prototype lenses on rabbits -- though there are some major caveats here. First, due to limits of circuitry, they can only display a single light-emitting diode at a time. Also, the scientists have yet to figure out a workable energy source -- at present, they need to be within centimeters of a wireless battery. The researchers have big plans, however, including the display of holographic images -- and, no doubt, information about which targets to destroy.