Scientists at the University of Michigan have developed a contact lens that can act as night-vision device. The lens has a thin strip of graphene between layers of glass that reacts to photons to make dark images look brighter. Current prototypes only absorb 2.3% of light, so the percentage of light pickup has to rise before the lens can be viable. The graphene technology can be expanded into other uses, like car windshields, to increase night driving abilities. The US. Army is interested in the technology to potentially replace night-vision goggles.