Hmm, well if it's the eyelids and not the actual eye then that may be something else. I don't know what it is but my first batch of chickens were swept with exactly the symptoms you are describing last year and half of them died. I hope yours pulls through! Also, just my opinion, but I would not have a humidifier in a small room with him. If he's having trouble breathing, his lungs are probably gunked up and the humidifier will probably make it easier for moisture to collect in his lungs, which would most likely not help. Good luck!