Here's a question: imagine someone who loses an eye, and gets a prosthetic. These days, that means a small camera that feeds a video signal to their optic nerve. But, obviously, this camera could also have its feed tee'd somewhere else. How would you feel around this person?
Depends on the person, but I don't think I'd feel weird around them. The difference with the prosthetic and glass isn't the technical capability, rather it's the perceived intent.
