That's good that you took her to be checked. The vet must have mentioned to give her a Betadine
bath as that will help with the pain & swelling, just pour enough in to make it look like weak tea.
Bathing her in that daily would make a big difference and help make her a little more comfortable. We have recommended that a lot for open sores but of course, you have to make sure that she has a
bath in just water first in case she wants to get a drink, wouldn't want her to drink any Betadine. Did the vet give her an antibiotic or mention using Neosporin antibiotic ointment after blotting the area when she is done with the
bath? The Neosporin is very helpful too. Giving her drinks of water or diluted Pedialtye (4 parts water to 1 part Pedialyte) will help rehydrate her faster & raise the electrolytes in her system. I would be very careful with the toothbrush, wouldn't want anymore chunks to come off and be sure not to rub too hard or pull on any of the skin or that will cause more raw, open areas. When you do the
bath, be sure to put a washcloth or dishtowel down in the container or sink to help her feel more secure so she doesn't slide around. Test the water temp by the inside of your wrist like you would for a baby, warm but not hot. I'll bet she'll like the baths & the extra attention. Does she like being held?
Please let us know the type of UVB you're using as some are very dangerous. And, getting an accurate thermometer is a necessity because if temps are actually too high, it can cause rapid dehydration & even stroke. The website link for the greens that Vicky gave you will be a big help to you and I'll bet she'll find some of the staple greens that she really likes.
She has been through so much, sure hope that area can clear up without a bad infection brewing. Do you have to take her back to the vet for a re-check? Please keep us updated on her, she looks like a real sweetie with a very sad looking eye.
It's SO easy to get attached to these wonderful creatures.