Seems times have changed.
25 years ago, I failed Isihara and passed Lantern, but left OASC as a very unhappy 18 year old who was "permanently unfit aircrew"
Also tried Air Traffic (NATS), told I was no good for that either
But I should look on the bright side, I did manage to convince a few MO's and SATCO's that I should be allowed a 600A
on the grounds that I have never jumped a red light.