Wow, Hthomp, I thought I was bad at 20/180!
I plan on having some sort of surgery (Lasik or PRK) once I'm active duty for a while. I have heard, though, stories about changes to vision after the procedure. Specifically, gradually changing to a 20/40 or so power, as the eye continues to evolve.
BTW, I just got done with a 2-week stint in opthamology; not that I'm an expert, but if you have questions, I'll see if I can scrounge up an answer.