Im new at this so don't know about vision? I had a big beautiful Leghorn that was almost to laying age when I got her. She got along with everyone else & didnt get picked on or anything as she was bigger than most. About two weeks she stopped going in the hen house, at night. We couldn't find her the first few days, then my son went to close the coop door one night, & found where she had been hiding. She was up in the tree that was by the door of the coop, couple of feet over my head! I worried as it was starting to get pretty cold. Tried to get her to go in every night but she wouldn't. She would go higher up when my son would try to get her. Unfortunately some predetor got her.
That's the only one that's done that, thank goodness.
Oh gosh I almost forgot WELCOME to BYC aissak!