Probably no one knows about these kinds of eye problems. Give him extra protein (I use canned cat food, but could be any leftover meat that's still good), give him raw garlic juice. If you think antibiotics would help, use them. Read through the forums and see if there is anything you can find from other users having eye troubles with their chickens. Just take some action and do what you think is right, that's all you can ever do with YOUR flock. Please keep us updated.