The glasses seem like a better form factor than a hand-held phone, for the use case where you're out and about and your hands are full, managing a service dog harness and/or cane, and trying to shop.

So, I guess you could mount your special phone for the blind on your chest or waist and have it talk to bone conductive headphones you're wearing. And pick up whatever you'd like described and hold it in front of your chest/waist.

(There's other options, the glasses just seem more convenient because they're on your face.)