My nephew is a Captain and has no 3-d vision but it is a static condition. He has never been able to see in 3-d.
It means that he has some difficulty in establishing what is infront and what is behind. However, as he has had it from childhood he, like many others, has developed his own way of determining distance.
One night - whilst still in r/h/s, the cpt said, "This approach is tricky at night and I don't have 3-d vision, so you had better take it." The F/O politely informed his Captain that he too, did not have 3-d vision .....
The cap had previously flown for the military, although not in the UK.
All the best.
The only smiley with glasses
