Wow, is it really that complicated for us slightly special people? I have CPL, unrestricted CIR and instructor. I can fly any time anywhere, certainly in Australia and have never applied for any kind of dispensation. My medical certificate was originally endorsed with up to CPL and Australian airspace only but now says 'Holder does not fully meet requirements of ICAO Convention Chapter 8 of Annex 1' (whatever that means, presumably the same). Nobody at CASA has ever asked me for anything different or special tests or reports ever. That is just the way my Class 1 medical certificate arrived after a standard medical examination in 1987 and every renewal since. It has not restricted me from doing anything up to and including CPL ever.
I might add in a previous incarnation in the UK, the situation was totally different. Medical flight test, then VFR, PPL day only and no way around it.
Good luck to budding Aussie CPL's with slightly different eyesight!