That's weird; the doctor who did my LASIK surgery told me the exact opposite.
This. Age doesn't matter but make sure your eyes are stable and done getting worse. If you get LASIK now and your eyes are still changing you are wasting your money because you'll just need glasses/contacts again in a couple years, as it won't suddenly make your eyes stop changing.
Also, if you already need LASIK to pass a flight physical, the AF is not going to hire you for OTS and then give you free LASIK. You have to qualify for your FC1/1A/whatever before they send you anywhere.
If you can squeak by now without it, you might be able to finagle LASIK out of them in the future, but it would be much later like after UPT at least. I'm not 100% sure on that part though.