I believed that your eyes could wear out. So every night before I went to sleep, I tried to remember if I had winked or looked at something through one eye only. I would then close the "overused" eye and leave the other open until I felt they were even. That way, when I was old, they would burn out at the same time.
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 used to think that if you don't close your eyes while you sneeze YOU DIE!!!!— Nutter
- My mom said she had eyes in the back of her head. I looked and looked, but never found them.Anon
- I used to be terrified of fire-flys because I believed they would burn if they landed on me.— kevin
- I used to believe that if you sneezed with your eyes open you would die!— Becky
- I used to believe that newborn babies didnt open their eyes for a few weeks like kittens :) — Cash