Researchers have given people a taste of superhuman vision after creating contact lenses that allow them to see infrared light, a band of the electromagnetic spectrum that is invisible to the naked eye.Unlike night vision goggles, the contact lenses need no power source, and because they are transparent, wearers can see infrared and all the normal visible colours of light at the same time.Prof Tian Xue, a neuroscientist at the University of Science and Technology of China, said the work paved th...