RAF will except laser surgery as long as it was carried out over a year ago from what I was told recently.
Not sure if the RAF will accept you in having under gone laser surgery, I don't think the policy has gone that far yet.
However, if you want laser surgery done once you are in, this can now be done. You have to pay for it, and you can only use companies approved by the medics (Dept of Optometry?) if you are aircrew. IIRC, the Dept of Optometry will guide you through the process.