I know you're concerned about $$, but you might want to consider a third eyelid flap on a particularly bad eye/s. Simply, the cat is knocked out and the eyelids are pulled together to be a natural bandage on the eye/s. 3 eyes have been saved with it here because they were all better when the TEF was released.

Polly's herpes never clears up--just better and worse. Everybody else's here DID go away completely. Her son Domino keeps a bit of his occasionally, so it seems to be a family thing.