The image of a pirate with a patch over one eye has become synonymous with the pirate folklore, but the reasons behind this common portrayal are not well-known. In this article, we will explore the various theories as to why pirates covered their one eye.

Theory 1: To improve night vision
One theory is that pirates covered one eye to improve their night vision. Pirates often sailed in low-light conditions, and it was challenging to adjust their eyes quickly from the bright light on deck to the darkness below. By covering one eye, the uncovered eye would become more sensitive to the darkness, allowing pirates to navigate the ship without the need for a light source.
While this theory may sound plausible, there is little scientific evidence to support it. Covering one eye may make it more sensitive to darkness initially, but it would not improve night vision in the long term. In fact, covering one eye for an extended period could lead to visual impairments and make it harder to see in low-light conditions.
Theory 2: To protect one eye from being injured
Another theory is that pirates covered one eye to protect it from being injured during battle. Pirates were known for their aggressive tactics and often engaged in close combat with swords and other weapons. Covering one eye would allow them to preserve at least one good eye, which they could use to fight and navigate the ship in case of injury.
While this theory makes sense, it does not explain why pirates would cover the same eye consistently. If pirates were covering one eye to protect it from injury, they would have switched eyes to avoid the risk of injuring their uncovered eye. Additionally, there is little historical evidence to support this theory.
Theory 3: To intimidate their enemies
A more popular theory is that pirates covered one eye to intimidate their enemies. The patch gave pirates a menacing look and made them appear more dangerous and ruthless. The image of a one-eyed pirate with a patch over one eye would strike fear into the hearts of their enemies and make them more likely to surrender without a fight.
This theory is supported by historical evidence. Pirates were known for their psychological warfare tactics, and the patch over one eye would have been an effective way to intimidate their enemies. The patch also helped pirates to maintain their anonymity. By covering one eye, it would be harder for their enemies to identify them, making it easier for them to continue their piracy without getting caught.
Theory 4: To cover a missing or damaged eye
The most likely theory is that pirates covered one eye to cover up a missing or damaged eye. Pirates often sustained injuries during battle or while working on the ship, and losing an eye was a common occurrence. A patch would cover the empty socket and prevent it from becoming infected, while also hiding the gruesome sight from their crewmates and enemies.
This theory is supported by historical evidence. There are numerous accounts of pirates losing an eye in battle, and patches were commonly used to cover the missing eye. In fact, some pirates even wore patches over both eyes to hide the fact that they were blind, giving them an advantage in battle by making their enemies think they were more formidable than they actually were.
In conclusion, while there are several theories as to why pirates covered their one eye, the most likely explanation is that they did so to cover up a missing or damaged eye. This would have been a practical solution to a gruesome problem, while also serving as a way to maintain their anonymity and intimidate their enemies. The image of a one-eyed pirate with a patch over one eye has become an enduring symbol of piracy and has captured the imaginations of people for centuries.