4 ms·

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-blind-see-their-tong

• leoc 9y ago
  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 https://en.wikipedia.org/wiki/Paul_Bach-y-Rita
  • zo1 9y ago
    Nice find, I didn't know about it. Thanks for the link!