For those considering it, just keep in mind that getting LASIK will prevent you from getting accepted as a NASA astronaut (due to the risk of explosive decompression of your corneas in the event of a sudden loss of pressure in a space vessel (last I checked)).
The refractive surgical procedures of the eye, PRK and LASIK, are allowed, providing at least 1 year has passed since the date of the procedure with no permanent adverse after effects.
edit2: fixed, not a astronaut per se. thanks glurgh
Wow, they've changed that a lot from when I first looked into it, which predates the oldest form I could find now in the Wayback Machine.[1] The brochure used to not mention LASIK either way. I was told about the LASIK ban by Bob Cabana. It looks like they've changed their policy now.
Also, they allow (really require) only once specific kind of corrective eye surgery for fighter pilots. On a bright side, Air Force will pay for your procedure if they accept you.