Yes that is the way I would do it now, this was 5-6 years ago...
problem is, when I went back to get my clear lense:
Op:"Yeah we have to send your frames to oakley to get the lenses fitted"
Me: "Er your joking right"
Op "Yes they have to be made to fit your frame"
Me "But they would have a zillion at oakley to fit to, are they that hopeless, that is just stupid, call them"
Op calls oakley..."Yes we have to send them to the USA"
Me "for fu... whatever, need them fine"
get home email oakley saying thats the stupidest thing I have ever heard, get a reply a few days later saying No you don't have to send them, my reply was Well maybe you should tell people that, they even rang you guys to confirm. Me not happy.
If I knew what my prescription was I'd just order online, but I don't and its time for new glasses...
Sorryt for rant, I'm sure some optometrists are great (and mine was really nice, they just didn't have a clue on this)