Going in as an NFO is definitely an option with your vision. I'm -4.25 in each eye and didn't have any problems applying. If I recall correctly, the vision requirement for Marine & Navy NFOs is a maximum of -8.0 as long as you see 20/20 with glasses or contacts. If your vision is worse than 20/200 (which yours almost certainly is), then you have to carry an extra pair of glasses with you whenever you fly -- not a big deal.
Your vision is definitely a no-go for a pilot slot unless you can get PRK, though. I considered PRK but made the decision not to go through with it.
Good luck with your decision, and feel free to drop me an email if you have any questions about NFO training, OCS, TBS, or anything else. I'm a Marine student NFO in Intermediate down in Pensacola.