As soon as you hear the word Pirate and manage to imagine someone other than Captain Jack Sparrow, there is a high chance that you are imagining someone with an eyepatch on one of their eyes. Truth be told, you cannot be blamed. Eyepatch-wearing pirate is a stereotype created by popular fiction. However, it does not mean that pirates necessarily did not wear eyepatches. In fact, one of the most successful pirates of the Arabian Gulf, Rahmah ibn Jabir al-Jalhami actually wore an eyepatch, after he lost an eye in a battle. Interestingly, there is a scientific reason behind why pirates were associated with eyepatches. It is less because of losing an eye and more because of a special technique. So much so, that even the US Navy used this technique in World War II. The reason behind choosing to keep an eye covered despite the eye being totally well is to keep the eye adjusted to the darkness. The human eye primarily contains two types of optical sensors, also called photoreceptors — cones and rods. Cones help us see when there is plenty of light. They also detect colour and details in the images. On the other hand, rods… Read full this story
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