Go ahead and get LASEK. Despite what the name implies, it's nothing like LASIK. It's basically an improved version of PRK. The difference between PRK and LASIK is as follows: in PRK they reshape the entire surface of your cornea, while with LASIK they just use the laser to drill some holes in your cornea in a radial pattern that will change the refractive characteristics of your eye the same way PRK will.
Here is why the military doesn't like LASIK: theoretically, those holes that they drill with the laser heal up fine and everything is peachy from then on. Realistically, one or two of the holes are going to heal up with slight cleavages, which can fill up with condensation if your body is subjected to high or low pressure: ie, scuba diving or in a cockpit. When that happens your vision gets very hazy and blurry.
LASEK arguably gives you better vision than LASIK. I had LASEK two years ago, and went from 20/50 in my left eye and 20/70 in my right eye with astigmatism in both to 20/15 in both eyes with no astigmatism. However, just so you know, the recovery process from LASEK is not fun. Imagine someone mixing sand and lemon juice and dumping it in your eyes, that's about what it feels like for the first 3-4 days post op. The tough recovery is why many people opt for LASIK instead, since LASIK involves burning off a fraction of the tissue that LASEK does, and thus inflammation and pain that results from the surgery are not nearly as bad.
If you want to get surgery, I would definitely recommend LASEK. I don't know this as a fact, but according to my old OSO the BUMED people would disqualify you for life from scuba/flight training if you had LASIK. They waivered me good to go for everything after my LASEK surgery.
Hope this helps.