Amy,
I'm always glad to share what I know and don't know. I had my shots two to three weeks apart and the relief lasted for better than a month if I'm remembering correctly. My doctor did say that it was a minimal amount of steroids but he also tracks all my injections and the amounts so he knows when he can repeat them. He has been doing a lot of work on me and he is a blessing. I'd be up the creek without him.
I've been in a really bad flare with this for the last week and if it keeps up, I may need to schedule another appointment sooner than expected. I'll be curious to hear what the neuro opthamologist has to say.
Take care and low pain wishes