Didn’t want to state a blanket “can” - these types of laws vary in a lot of places.

Bluetooth audio, as well

Check your local laws, but you can probably buy and carry a white cane so long as you aren’t trying to scam the legal benefits of it.

It’s huge for this. Aiming and trying to frame the camera for a phone app sucks. Pointing your head is a lot more natural.

The "medical device " solutions are bulky, exceedingly expensive, and lack creature comforts like Bluetooth audio from your phone.