I have a hen with one pupil very small and constricted . It is puffy around her constricted eye I have been watching this, and it has not changed for over a month. At first, I thought that it was a hold over from the fowl pox. My husband says that she just needs glasses. That would not explain the puffiness. It is not watery or red or any sign of infection or detritus in it. I am stumped. do any of you have any ideas? Is this something that just 'is', or something I can help fix?