Similarly, an app for either AR glasses or camera glasses that pair with a phone should be able to help totally blind people navigate by providing an interface

Similarly, an app for either AR glasses or camera glasses that pair with a phone should be able to help totally blind people navigate by providing an interface like "virtual sonar", where headphones play sounds in which pitches, amplitudes, and doppler effects encode the direction to the destination and the bearing and distance of each nearby obstacle or danger.