A few years back I had an initial civilian class 1 medical in Brisbane and had my eyes tested by the same guy who did entrants to the Australian air force, told him I was worried as I had been declined many years before for RAF aircrew due to poor left eye and he confirmed, while handing me my class 1 clearance, that I would have passed with the Australians with that standard.
He then said, "never mind, that probably saved your life !", an unusually cryptic comment in the circumstances
, do the Aussies crash a lot ?
However, with the recent announcement of increase in defence spending in OZ, maybe those defeated by anachronistic UK eyesight requirements should have a go there.
And if they tell you that you are too old, I'm told Canada is a good place to go, no upper age limit as long as you pass the medical and can give the minimum required return of service, as I understand..
Hope this helps.