One of DHs bantams had an eye that looked like that. I flushed it with saline twice a day, wiped the gook off with a cotton swab, and applied terramycin eye ointment. It was healed in about a week. There were a few times I almost gave up because it got worse instead of better.
Anyway, that's all I have to contribute. I think the terramycin was like 7 bucks a tube.