Hello,
Yes, vets are expensive, that is for sure. That's too bad his vision is compromised so much.
He isn't able to eat phoenix worms at all, or just sometimes? You are handfeeding him? You could try small superworms, too for variety.
Can you post a couple of more pictures to get a better look at his eyes, thanks.
Is he healthy otherwise?
That's good you are going to change out his UVB from the coil to a long tube. He wont be getting very good quality UVB from the coil light, at all.
Are you giving calcium several times per week, too?
Tracie