I'm red-green colorblind, which means some shades of red and green look a lot alike to me, and if there's a stop sign in a bunch of trees and bushes and other foliage, I sometimes can't see it.
Years ago, when I was about 13 or 14, I went to the eye doctor. It was a new eye doctor because for some reason my family never went to the same eye doctor more than once. She was giving me the color blind tests, where there's a circle full of colored dots, and the colored dots form letters or numbers that you can only see if you see right. I couldn't see anything in the one that tests for red-green colorblindness, because, d'uh. But she says in this real accusatory tone "I don't believe that you don't see anything." I had to convince her that I really was red-green colorblind. Bitch.
