You people are amazing, thank you for your time.
@CTG: Your post just gave me new hope! I can easily differentiate between red and green and it's the shades which seem to get me during the Ishihara Tests. I will book an appointment with my optometrist(?) to get a better idea, thank you. Is that lantern test something I will be able to do with NATS? Will they even accept letters/certificates which state that I passed the lantern/CAD test if I decide to do it elsewhere?
@HEATHROW DIRECTOR: Yes I'm new to this forum and learning my way around. I noticed the CVD thread the other day and have been reading it for quite a while. Thank you.
@eastern wiseguy: Congratulations for having worked so long in the industry! Is the Lantern Test still done today by NATS? According to their website upon failing Ishihara (resistance will be futile in my case) I will be required to do the CAD test.