I don't understand what you mean by circled means you couldn't do.
I'd be more inclined to go with the specialized care. Not only for the eye, because it's specialized but because of another item noted on the specialized care that isn't on the other one.
Dental Care.
If his molars are overgrown and need to be trimmed, ONLY an exotic vet can do this. DO NOT trust anyone else to attempt it. Part of the reason he likely needs his teeth trimmed is because he isn't eating enough on his own, and critical care won't wear his teeth down the way hay does. I'm not in the least surprised that he needs it and quite frankly I'm surprised at myself for not bring that up to you. I had meant to, and neglected it. If they can do the surgery tomorrow plus the teeth trim, do it. It will get him on the road to recovery MUCH faster the sooner you do it.
My vet once told me, "A month is a long time in the life of a guinea pig." And if you consider their sleep/wake cycles and their lifespan, a month for us is like a year to them. Another month of pain is like a year to Smokey.