LASIK and SCUBA
It may be a LOT too late to reply to this but since i just found the site, I will do it anyway.
I had LASIK done in November of 1998 (a wedding present from my wife). While we were in Hawaii last winter (December 2001) we did a LOT of diving off of the Kona coast (by LOTS, I mean that we did 2 dives a day every second day for 10 days which may not be a lot for an instructor or someone who lives in a diving area but Germany is NOT known for being a place to dive!

)
Anyway, my old perscription was -6.25 +120 right and -5.75 +195 left meaning that I was blind as a bat and had astigmatism to boot. After the surgery, I was -0.25 in both eyes with no astigmatism.
I dive with an older model US Divers tri-Pane mask (Cousteau style thing) with the purge valve still closed. I had no problems at all while I was diving and that was regardless of the fact that my mask leaks (forgot to trim the moustache) so even with a little salt water intrusion, I had no problems.
What was really funny was that, even getting a few drops of salt water in my eyes didn't burn like it did before the surgery. Maybe that is because a lot of the nearves are dead. Of course, I worde hard contacts for 15 years too so that hasn't helped.
The bottom line is that I had no problems SCUBA diving, even down to 120' (one deep dive).....
Bret