[zo1]

It's actually a little tab that the blind person puts on their tongue. Link below.

https://www.popsci.com/fda-allows-marketing-device-lets-blin...

[leoc]

That's the current model, the Brainport. The original was indeed a chair, back in the late '60s, and there were several users. https://en.wikipedia.org/wiki/Paul_Bach-y-Rita

[zo1]

Nice find, I didn't know about it. Thanks for the link!