Whatever this is, it sounds to me like it's way past "humidity" issues. If the eye is as injured as it sounds, increasing the humidity isn't going to suddenly "cure" the eye.
You need to find a vet that has solid knowledge and experience in treating snakes. While I appreciate the typical small-animal vet willing to TRY to help, they run a high risk of doing more harm than good.Eyecaps don't usually need to be messed with at all, except in cases of serious neglect where several layers of caps have built up over time.
Here's a list of vets recommended by our own members who have personally had good experiences:
http://www.ball-pythons.net/forums/s...ad.php?t=56792