From children’s books to theme park rides to childhood games that had your little sibling walking the plank, the hallmark of any good pirate is an eye patch. So did that many pirates really have a missing eye? That seems like a very specific ailment to suffer from. Though researchers have yet to find a historical source to confirm, it’s becoming more and more plausible that the plundering sailors used the ocular accessory to improve their night vision. Moving from the outside of the ship to the near darkness below decks required a moment of adjustment to the dark. However, if Captain Hook had one eye that was constantly in darkness, all he’d have to do it switch the patch to the other eye to enjoy the old school, high seas version of night vision. Shiver me timbers!