Once upon a time there was a gang of pirates. They were colourblind and they thought brown was blue. They thought they were sailing the Pacific Ocean but they were actually sailing across the African Jungle. They were crashing into trees left, right and centre. The ship was shaking wildly, so wildly that glasses flew out of the case and landed on the captain’s eyes. Then he realised he was sailing on dirt. And he realised he was colourblind brown. The next day he went to the nearest eye doctor.