When I was a kid my brother told me that 20/20 vision was perfect vision. I took this a little too literally and thought that it meant even if you were having gravel poured right into your eyes you could still see perfectly.
A childhood belief about eyes

others believed things like this
- I thought I had X-ray vision and could talk to animals and they could understand me.— Kitty Lover
- I used to believe that if you ate carrots you’d have night-visionAnon
- When my mom would say that my eyes were bigger than my stomach I thought she meant it literally.— Amanda
- My daughter used to believe that when someone is fired from their job, it meant it literally.— Sally's mommy
- I used to believ that "Shooting the Bull" literally meant what it states.— DJ
- I thought that the jetstream from planes was white paint. Which was constantly poured out from the plane.— Tore