Margen
The belief that carrots give you eyes like a lynx comes, in large part, from World War II. In 1940, Britain's RAF began shooting down German bombers at night with a secret advantage: an onboard radar they weren't yet ready to reveal.
To explain such accuracy in the dark, British propaganda offered another version: their pilots, they said, could see at night thanks to eating lots of carrots. They even turned a night-flying ace into the poster boy for that miracle diet. The public bought it, and in doing so helped keep the radar in the shadows.
Carrots do hold a grain of truth: they provide vitamin A, needed for vision. But if you already have enough vitamin A, eating more won't grant you night-time superpowers. The myth, however, outlived the war and is still at the table eighty years on.