Originally Posted by
eagleatr
I asked my AME once since I've been doing the color blindness test for a lot of years if you could go color blind if you weren't born that way. His answer was very simple: no (excluding some kind of eye/head injury or eye disease).
It's funny this comes up now. I just asked my AME the same question 5 months ago and he said the same. He added that he asked the guy that came to observe him doing exams why this was tested on every exam. I can't remember the answer given but it wasn't convincing as a "we need to do this" argument.
Fwiw, my AME is a pilot.