I temporarily had a blind jeweler and surgeon once. While it had practically no effect whatsoever on their professional life, imagining the result was hilarious.
Temporarily? They got better?
Well, yeah, seeing how they're not blind anymore. The disease didn't outright rot their eyes and they required no medical attention, so...
And they were not alone, they are still occasionally joined by the usual kind of moron who waits at the worst possible time at the ER for something extremely minor (well, blindness IS minor here) and goes back to work once the diagnosis is made. It's a strange syndrome that literally did nothing more than render eyes useless for several months. I tried exploiting it, but we all know how random diseases can be.