I can only say what CASA have told me and what Qantas have confirmed for me.
The medical officer for Qantas also said I should keep my eye on things in the future, said in a way that sounded like a subtle hint that monocularity may be looked at differently in the future and that international flight may be possible.
The other work around is to get an FAA Medical with a SODA (Statement of Demonstrated Ability) to prove that my condition does not affect my abilities to fly safely. That would satisfy the ICAO requirement, and having the CASA medical will satisfy entry requirement of having an australian medical certificate.