I will bet some of you still think this is true. Read this...
Myth one: Eating carrots improves your eyesight.
Truth: Though carrots contain a high concentration of vitamin A, essential for healthy eyesight (vitamin A defficiency can cause blindness), an extra helping on your plate won't give you X-ray vision. In fact the origin of the various sight-improving attributes of the humble carrot is generally credited to a campaign of misinformation carried out by the British Government during the World War II. British intelligence didn't want the Germans to know that they were using radar to detect bombing raids so they spread the rumour that they were feeding their pilots carrots in order to improve their vision. Trouble is the campaign was so successful people still believe it even today! Of course all things are relative - if you start off with a vitamin A deficiency, eating more carrots will of course improve your vision.
So if you are beyond 40 and need to improve eye sight. Eat Spinach.
Yes, this deception story is true. They paraded their top scoring nightfighter ace, a guy they nicknamed " Cats-eyes" Cunningham around during the early part of the war. They credited his ace scores for shooting down fighters at night to a healthy diet of carrots. But actually at that time, for dog-fighting at night, the british had a primitive Airborne Radar , which they called " AI" ( airborne intercept) to partially disguise the radar technology.
But the Germans were only one or 2 years behind as they also had airborne radar from 1943 onwards.