Hi, separate her from the flock. mine started getting this, one by one. At first I thought it might be an infection, but later it seemed to be that one hen had gone heat crazy and was trying to peck out everybody's eyes while on the roost. Every hen but one got this in at least one eye. I had two who got it in both eyes, they were hard to feed and water as they seemed very depressed with both eyes affected. After I removed the Suspect, one hen recovered, the other went blind. Only once did I see a hen take a jab at her roostmate's eye. She was immediately removed and they all healed up fine except for that one who went blind. The Suspect's eyes were totally fine. WATCH THEM CAREFULLY.
Heat Rage is a thing.