Hello, Martin ...
I know that an eyepatch is part of the common image of pirates, but just how likely is it that a man would receive an injury to one eye, and not have half his head blown or sliced off at the same time?
However I just read a theory that pirates (and other sailors) might wear an eyepatch so that they could go from the brightly lit top deck to the gloomy below deck areas without being temporarily blinded, by switching the patch from one eye to the other.
I have two stories to tell you. One is true. And, one is not.1. Many years ago (in the time of the pirates) a young boy became friends with an old pirate.
One day the curious young boy asked the old pirate how he had come to have a wooden leg.
The old pirate said, "Aaarg ... Well it be a cannon ball what took me leg, lad."
The young boy then asked the old pirate how he had come to have a hook for a hand.
The old pirate said, "Aaarg ... It be a sharp cutlass, in a duel, what took me 'and, lad."
The young boy then asked the old pirate how he had come to wear a patch over one eye.
The old pirate said, "Aaarg ... it be a seagull, lad."
"A seagull?" gasped the young boy.
"Aye, a seagull, lad. That bird be flyin' o're me 'ead. An' I looks up. That seagull lets loose a plop right in me eye. I forgets what I be wearin' this 'ere 'ook. Took me own eye right out, I did."
2. Many years ago, when I was young police officer, an old policeman told me about the "one-eyed" patrol.
"Son,' he said. "Don't ever search inside a darkened building with both eyes wide open. Close one."
Before I could ask why, he gave me this advice, "If there's someone in there who shouldn't be, they might flash a bright light in your face. When they quickly turn off the light, you'll be blinded, but they won't. If you have one eye closed, when they quickly turn off the light, you'll still be able to see."
Which story do you think is true? ... All the best,
Richard