Sometime around my gradeschool years, I remember learning a really neat trick that was (for lack of a better word,) popular. I don't quite remember all of the details, but it was something to the effect of having someone close his/her eyes and look downward for a while, then think of a number between 1 and 3 (inclusive), have them open their eyes and look upward. Then, by looking closely at the bottom part of their eyes, there would be either 1, 2 or 3 veins prominent, depending on which number they had been thinking of. Personally, I always found this fascinating, but as far as I can tell now, it either doesn't really work, or it only works with kids...
A childhood belief about eyes

others believed things like this
- When I was little my friend told me that if you snease with your eyes open you eyes will fall out!Anon
- I can remember thinking that is I hid my eyes, and couldn't see anybody that they couldn't see me.Anon
- I was born brunette with brown eyes and dark hair, i thought people with blue eyes, had water in them.Anon
- when I was young I used to believe if I squinted my eyes and it was windy my eyes would stay like this forever— Jeanne
- if I watched too much TV, I would get 'googly eyes' as mom promised, and my eyes would pop out of my head.— claire
- I used to believe that if you stared into a cat's eyes, my eyes would turn that color too.— silvia