Patent ID: 7620493

Claim:
A system to assist a user with low-vision to navigate from a current location to a second location within an indoor environment, the system comprising: a distance determination device suitable for use within the indoor environment; a memory containing an environment data of the indoor environment; a user interface suitable for use by the user with low-vision; and a processing unit communicably coupled to the distance determination device, the memory, and the user interface, wherein the processing unit is configured to determine, via the distance determination device, a distance traveled by the user in the indoor environment or from the user to one or more objects in the indoor environment; identify a current location in the indoor environment using the distance and the environment data; determine a route in the indoor environment to the second location based on the current location and the environment data; and provide via the user interface, a directional cue to the user with low-vision based on the route; wherein the distance determination device determines the distance, at least in part, by transmitting and receiving a signal to be reflected from the one or more objects and then returned to the distance determination device, and wherein the signal received is a substantially same signal as the signal transmitted.