You actually make a good point..
Actually, being color blind isn't obvious. You can still see colors, but it's difficult for you to distinguish between different shades of certain colors. That's why a more appropriate term for it is color vision deficiency.
Here's a scene from Little Miss Sunshine where one of the characters realizes he can't be a pilot after a color blind test:
https://www.youtube.com/watch?v=zcLlq4Lml7A
maybe, at first the brother didnt know it was such a big deal.. + he left to achieve being a cop, but in the process, that he couldnt be one cuz it turns out it is a huge deal & affect his ability as a cop.
Love that example is that a movie? I've never seen it.
No, actually you don't really realized it. My brother wanted to be a doctor and already passed the entrance exam and then come the health exam and that's where he found out for the first time that he is color blind and he can't be a doctor :(
Ohhh... that part was so depressing...
"already passed the entrance exam" -- Oh my.. that's hurt. (ಥ‿ಥ)
Really?
Well in my case the only person with blind color that I know is my dad and he told me he knows since he was a child... in my sister and my case my dad went to a doctor in order to do the test about blind color and we both are ok (my issue is that I have a really bad eyes/hands coordination)...
The reason is because, as my dad told me, there are several members of his family that are blind color... never knew any of them, they live in Europe and we live in Latin America...
Even though my dad couldn't see any diference between red and green, he has no problem driving...
People are born color blind except if they had an accident... so he should known since the begining that he couldn't be police officer...
Mi dad was color blind and he never had any issue as engineer... but he always used blue clothes, I have never seen him with other color than blue (except his black suit for important events)