Make this post on Pilots of America...
You can do this anonymously if you like. Alternatively, if you are an AOPA member, you can post in their Medical Matters forum (also anonymously if you want). Either way, a fellow named Dr. Bruce Chien will answer up and you can count on his answer to be the right answer. His Website, if you care to check it out, is...
I can't remember what the FAA's take on the nearsightedness correction is, but I believe if you have this done (regardless of the reason) you'll need to ground yourself for up to six months. Getting this done before a deployment may be a good time to do it since you probably won't be flying much over there.
Good luck over there and keep your head down!!