Karen--
Sorry you are dealing with what sounds like a very unhappy eye, though fortunately at least your doc says the cornea's not scratched.
Like you, I followed up my AN surgery with a nerve graft, which unfortunately didn't solve my dry eye problems. I know a punctal plug (where your lower tear duct--where the moisture constantly created in your eye drains--is literally "plugged") has helped some folks here. I tried one but it popped out twice, and I was so tired of eye problems at that point (nearly 2 years after surgery) that I opted for a more permanent solution, a cauterization of the tear duct. Though I still rely on Celluvisc drops during the day and Refresh ointment at night (and wear sunglasses outside no matter what the weather!), the cauterization has made me much more comfortable, and I haven't had an opthalmic issue (corneal abrasion, keratitis--which it sounds like you have, etc) since getting it done.
Good luck!
Carrie