I just want to give some advice based on my own personal experience related to the vision qualifications for occupations.
I would recommend making sure you have at least two occupations you'd be willing to do, and make sure they don't have the same vision requirements. So say you need to be V3 for something, and you are unsure if you have a good enough vision, make sure you have something else (unless you really, really, really don't want another occupation) that is a V4. That's just an example, but you'll find it helpful.
I had Armoured, Artillery, and Sig Ops as my preferred trades. I ended up being in V4 by just a bit, and I couldn't get the other two, but I knew I'd be happy in Sig Ops so once they determined all this, they just offered me Sig Ops and there was no disappointment on my behalf.
Basically, just make sure you have all your options planned out. I know I want to eventually move over into the Combat Arms, but that'll be down the road once I can afford laser eye surgery. I also understand that it will be based on the Military's need, so I'm happy fulfilling out my contract as is. So this isn't a starting point to hold me over until I can go Combat Arms, but this is just one piece of a hopefully long and somewhat varied military career.
You just won't want to be disappointed if you don't get into a certain trade because of your eyes. There's so much you can do and be happy with, it just takes a lot of reading to figure it out. I had my doubts with my eyes so I checked and rechecked to make sure I found other positions I would be extremely happy in.
Oddly enough, it was my colour vision which I hadn't factored in that almost cost me all my choices haha. I guess you can't prepare for everything.
