A revolutionary new kind of contact lens may one day be on the market. A wearer will be able to 31 virtual displays of images or information in front of them, just as robots and superheroes 32 in the movies. Looking through these lenses, the wearer would not only be able to see 33, but it would also seem as 34 a computer screen in front of them. Scientists at the University of Washington have made a major 35 in the technology required to create such lenses, including a prototype 36 consisting of a contact lens with an imprinted electric circuit. 37 the technological challenges, contact lens was also difficult because building such circuits involve the use of toxic 38. However, the research team eventually found a way to do 39. Since the technology for these lenses has yet to be perfected, it will be some time before anyone can try 40. Nevertheless, possible commercial applications are already being considered.