Ashs eye ulcer

Question
I came back from a 2 week vacation to find one of my rats, Ash, had a bad eye problem. Someone was checking on them but hadn't noticed anything, so i don't know how long the poor little guy had this problem. The vet said it's probably an ulcer.
The eye is completely opaque. When i shined a light on it, it was just gray and reddish, kind of like pus-looking. And there is a tiny clear ball/lump on it.
The vet gave me BNP ointment. And Ash is also on Baytril. It's the fourth day and it does seem to be getting better.
But i'm nervous and disturbed. I really would like a second opinion from you (though i know it's hard without seeing it), but i know you know alot about rats, maybe more than my vet. Do you think this is the right treatment? And how long should it take for Ash to get better? I just want it to be the best treatment, and i want to do all i need to be doing for him. I know i should've asked my vet more questions, but i didn't.
(A little history on Ash: He's now maybe two and a half. I rescued him over 6 months ago. He had a head tilt and a squinty eye. We put him on Amoxil and Baytril, and both problems got better, though he sometimes still has a little head tilt and a watery or slightly squinty eye. I read that this may be because he had an ear infection that wasn't treated by the previous owners. But now i'm thinking there must be another underlying problem because it's the same eye that now has the ulcer. And i'll probably never know what it is, poor little guy. He's not the healthiest boy.) I just want Ash's current problem to get better, the best way possible.
I'd love any other thoughts you may have.
Thanks Sandra!

Answer
Hi there

If its getting better, thats good news.  Often, a nasty infection ends up with an enucleation, which is when the entire eye is removed in order to stop infection from spreading.  I would keep doing what your doing since your seeing results and the treatment plan the vet has your little friend on is correct. This ointment is a  Combination of three different antibiotics for  Ophthalmic use and the combo of meds attack a broad spectrum of bacteria so this is a good choice along with the oral baytril.  As for the head tilt, sometimes even when an ear infection is treated, if it was allowed to advance without proper treatment, head tilt may be permanent, but as long as the rat can function, it seems to disturb us more than it does the rat.  Hope this helps and hope your little one continues to heal.