From my recollections of discussions with the Surgeon General's team when the MOD policy was being changed, LASEK was OK but LASIK was not. This was because there was some doubt about the long-term stability (healing) of the epithelial flap that is lifted during LASIK before they lase away the corneal tissue beneath it, and therefore whether it would lift when exposed to air blast during an ejection. That would not be amusing at all.
That was a while ago now, but ShyTorque is right - if you are serving aircrew you need to check the regulations. Better still, check with your MO, who will be able to unravel the regs better than you can. The conversation will be private, and you would only need to get the chain of command involved if you were going to voluntarily render yourself unfit for a while by having the surgery.