Bromhead, a quick search for 'Medical Standards' on the RAF web site will provide you with your answer. Essentially, you can't have had the procrdure in the twelve months prior to submitting your application. The medical bods at OASC will decide the rest.
AeroUK, I'm sorry but I do not yet know the exact equivalents. I could give you an assumption but I don't want to risk giving incorrect information. The answer to your question should be answered with the release of the directive which could be on Friday.