Hi mate
Not fixable I’m afraid it’s apparently neurological rather than to with the eye directly.
I can remember applying for a security job when I was in my late teens which involved CCTV but was rejected as my colour vision not perfect.
Looked at DGSA but not keen and I don’t think you would get a job purely on the basis of just having that.
Don’t think I could tolerate standing up in front of a classroom either.
Looks like operator cpc might be a good bet.
Thanks for responding. Still a bit ■■■■■■ off at the moment coming to terms with wasting 6 months preparing for LGV. Had my heart set on it.