If you hold your finger a few inches from your eyes, at some point of focusing you see double. When I was little I thought I was seeing through my fingers and that I was slowly turning invisible.
A childhood belief about eyes

others believed things like this
- I used to beleive that a straw would float in soda because a little invisible elf would hold it up.— Mike
- Never point at a grave, if you do your finger will rot off.— KL.R
- I used to believe that when you closed you eyes you were invisible and no-one could see you!— Andrew
- I used to think that if I closed my eyes I would be invisible— invisible
- When i was a child i used to believe that i became invisible when i covered my hands with my eyes.
— Owen - That unicorns were real. They simply had invisible horns that only people with special eyes could see
— Katie