M.E.
I changed our doctor to Dr. Wagner last fall - he is Dr. Rushes' partner. I had no issue getting my daughter in for her 5 year old well child check. But I think Dr. Rush is the more popular doc. That said, I think Dr. Wagner is wonderful. I know they have appointments reserved everyday for urgent issues (ie. sick kids) but the times for well child appt are limited because it is a longer appt. At my last doctor my daughter, whose BD was in Sept, wasn't able to have her well child appt until November.
However, I have spent hours on hold over the years, especially when my kids were babies. It was to point that I made sure my phones all had speaker phone because I was often holding. That was more common with San Francisco Kaiser, though. Sometimes it has to do with the time you call - Monday's are the worst.
Regarding the ophthamologist, do you have an HMO and require an official referral? If so, perhaps pleading with them that this issue (your daughter's medical issue) really concerns you and you want to address it asap. But I've found that if the doctor isn't putting it on the fast track it is probably not a time sensitive issue.
Let me know if you need more info. We've been in PH for 7 years after moving from SF. I know it can be hard to figure everything out. Good-luck. Michele