Once again not a Dr. here Augie... but in my opinion, Macular Degeneration isn't a sudden and spontaneous occurance. The wet is bothersome, but I don't see it as a lifethreatening issue. Is she a smoker? At 92 years old I would bet no, but I have seen it haha.
If it were my mother I'd see if under the cirumstances we could skip the waiting room and go straight to the Dr. If they wouldn't make an exception piss on 'em, I'd wait it out.