When I was younger, I believed that only people with blue eyes could see every color because their eyes were "clear" enough to see colors (I have blue eyes, so this made sense) and that people with brown or green eyes only saw those respective hues. Every one in my family had blue eyes so I never had a chance to really ask anyone else.
A childhood belief about eyes

others believed things like this
- I was born brunette with brown eyes and dark hair, i thought people with blue eyes, had water in them.Anon
- i used to believe that people with blue or green eyes saw that certain color— mellactica
- I used to believe that if you stared into a cat's eyes, my eyes would turn that color too.— silvia
- When I was little my friend told me that if you snease with your eyes open you eyes will fall out!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