A picture would be a lot of help but you might need to make a few more posts before you can attach one.
Dust from bedding can sometimes irritate their eyes, what bedding are you using?
I agree with herbi7, bringing an animal to the vet when you need to is absolutely vital. There can't really be a compromise. You might negotiate to save money elsewhere; use your pocket money, sell some old DVDs, ask for some christmas money early or something. It probably won't be too expensive but if they need the vet, they NEED the vet