I am so sorry to hear about your little guys eye. We have been dealing with a similar problem. My Maddie's eye started out like an infection, however the ointment from the vet did not heal it up as it had done in the past.
I eventually had to take her to the E.R. because her infection was causing her pain. The vet there said that she appeared to have a damaged tear duct, which could have been caused by an infection. This had led to dry eye. Basically, her eye was creating mucus to replace the moisture produced by the tear duct. The mucus was keeping an infection in her eye. (a vicious cycle
) The vet gave me eye drops, just like you or I would use, and Gentak, suggested to me my Nancy1999
. She said it may take several weeks for her to get completely better but by alternating using the drops, she has found releif and we are seeing improvement each day. I hope this helps and good luck!
