I can think of lots of possibilities here. What are you thinking of, a device that a blind person would hold and that would contort to show surroundings? It's still a relatively new area, but I think there is something to be said for new ways to relay surroundings. Now, we have GPS for location info, canes for knowing about nearby objects, surface (sidewalk vs. grass), and some other lesser-used devices that can detect objects within a certain distance, though I've never had great luck with the latter. But using modern tech to quickly relay surroundings for driving, riding a bike, or other faster moving travel is a definite possibility. You have to account for what's in front of you, next to you, and possible hazards. Also, what's the best way to relay this info in the quickest amount of time.