I'm in the Air Force and just had PRK done about 16 days ago. They say on average it takes about 2.5-3 months to get back on flying status. That will vary with each individual person.
I had some burning in the eyes about 24 hrs after the surgery that lasted about 1.5 days, but that's it. Some pain meds they gave me fixed that right up. The vision changes daily, but that's just part of the healing process. I have to take steroid eye drops for 4 months to keep the eyes from healing too fast so that they don't scar.
I still don't have the clarity I had with glasses yet, but they say it takes 6 months to get optimal vision. Also, that's just to be expected at the stage I'm at after the surgery.
I talked to several guys I fly with before I had it done. They all highly recommended it.