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Wow! If I had a nickel for every time a Trek show had a blind engineer, I'd have two nickels. Which isn't a lot, but it's weird that it happened twice. Right?
(startrek.website)
Transcription: A side by side picture of Star Trek Strange New Worlds character Hemmer and The Next Generation character Geordi La Forge.
Geordi isn't really "blind" though, he just sees in a different way than other humans do
Not directly related, but my favorite exchange about human eyesight...
(Lt. Commander Data) "Sir, Lieutenant La Forge's eyes are far superior to human biological eyes, true?"
(Capt. Picard) "M-hm."
(Lt. Commander Data) "Then why are not all human officers required to have their eyes replaced with cybernetic implants?"
(Lt. Commander Data) "I see. It is precisely because I am not human."