Where are you located? It could possibly be fowl pox if there are mosquitoes out now. Has there been any excessive pecking, possibly injuring the chick. The eye looks weird. What does the other look like?
No mosquitoes. I am from Pakistan and the chicks were in a small brooder but the 4 months old
Were brought to the same room. The others eyes are shut like this too.
I gave the chicks antibiotic injection and one died on the spot after injection! I have caused more misery to myself... I am so unhappy.
Looks like the chick has wet feed stuck in the eye and on the face.
It would be Fowl Pox or the beginnings of respiratory disease, it's hard to know.
Getting some testing would be a good idea if you still have the body of the chick, send it in.