Things may have changed recently, but last I was told was that if you got LASIK on your own, you would never fly for the Air Force again (permanently disqualified). And obviously someone that didn't have their wings yet would be permanently disqualified as well...
This came straight from the FS. He said that you have to go through the AF to be approved for the LASIK, and it has to be performed by an AF approved doctor.
PRK is another story...