Here's and interesting one. Back in the day, pilots use to wear eye patches lined with gold to prevent the loss of night-vision in at least one eye when flying over brightly lit cities or in case of nuclear or laser attacks. At some point they did however, as cool as it was, realise that it's more effective to just put this layer in the visor. And of course nowadays they have other means of fixing this problem, night-vision goggles as an example.
Side note: The fact that pirates did something similar for going below deck is apparently a myth, or at the very least there is no evidence to support this theory.
Yeah, the eyepatch thing has been a handy trick for going from a light to dark place and still being able to see for a long time. I wonder where it actually originated from?
After some mild googling, it seems to not have an exceptional origins of any kind, it's merely noted that it was warn by people with hazardous jobs like soldier / sailor, and that apparently blacksmiths wore them to keep at least one eye safe from the forge. I imagine safety goggles wasn't a thing back then. :P