Excellent.
Perhaps the important thing is just to get very well fitting glasses rather than going for something purpose built.
I don't even do aerobatics, and when I do it will certainly be nowhere near the '10G' I mentioned, that was just what Mr Bonhomme managed to pull. Essentially I didn't want to buy something now, then buy something else if and when I do start any form of aerobatics.
Thanks for the advice.