The last cat that I fostered that had dilated pupils had cataracts and was blind. His pupils did not expand and contract like normal, but were always large, and he constantly looked surprised.

I know this is not what you want to hear, but you might want to watch to see if she has trouble finding her way. Does she hug the perimeter of the room, hug the walls when walking? Alex had more issues than just blindness, so he did get stuck in places and didn't know how to get out and just howled, but that's because he was deaf as well and totally disoriented.

Roll a ball or something without sound in front of her and see if she follows it with her eyes. See if she can tell your hand is moving in front of her face.

My own vet could tell that he was blind, he didn't need to go to a specialist to have it diagnosed. If Priscilla has other issues, I'd definitely say go to a specialist. What other ideas does your vet think might be an issue??

Hope things go better for Priscilla. I'll be thinking about you and Priscilla. Please give her some big hugs for me. She's being a brave girl.