Just to follow this up, I scraped by the eye exam in Newport. Although I was technically out of limits for astigmatism, I was still able to read the 20/20 chart while dialated. I came down to Pensacola, still worried. I went to NAMI and the same thing happened. The doctor carefully and suspiciously read my file, and had me do all of the same things I did at Newport. Again, I was able to read the chart even though my astigmatism is outside of the limits. A side note, there are certain letters that are NEVER found on an eye chart (the type the military uses anyway). I was only aware of this after my NAMI test when the doctor asked me if I knew. So if you're borderline like I was that would certainly help knowing which letters those are. He suggested I put in a request to have my eyes lasered if and when I make it to the FRS level. LASIK is now available to aviators, and only puts you down for 4-6 weeks, I believe.
All of this being said, I think I am a rare case and got extremely lucky. I spoke with one other guy, who was in my OCS class, that wasn't even offered a re-test when told he was outside of the astigmatism limit in Newport. He had to redesignate to NFO while at OCS. Don't be like me and listen to your recruiter who rode subs, and think he knows what he's talking about when he tells you 20/40 each eye is all you need. If you know you're outside of the limits, look into getting LASIK/PRK out of pocket well before you go to get a commission. Try to get the waiver in pocket before you go if possible. I knew another guy who had PRK done before attending OCS and he was completely stressed all the time about getting his waiver cleared. It worked out for him in the end.