When I was attending the Mississippi State University, and since I was a pre-med major, I was put in charge of checking the incoming ROTC freshmen for color-blindness. I could swear that I was told by the physician heading up the physical examinations that females would not be tested since color-blindness could not occur with them.
Why check for color-blindness with these freshmen? Any who had color-blindness (and there were perhaps a dozen specific color-blindness traits) would be put into the Air Force to study aerial photographs (no such think as digital or even computers back then). Their color-blindness actually helped them read maps and photographs better than those with "normal" sight.
Now you know the rest of the story.
