I had PRK (USAF, Keesler AFB) about 3 months ago. It hasn't been a pleasant experience. I was about -2.5 in each eye, correctable to 20/12. Now I'm about -.75 in each eye, correctable to 20/20. Having said that, it appears that I'm in the bottom 1% of PRK results - all of my friends boast of their uncorrected 20/15 or better vision. On one hand, PRK got me to about 20/30 and I can do a lot of things without glasses. But on the other - if PRK goes bad, it goes really bad. Just google PRK or Lasik disaster and do some light reading.