avian pox and one bad eye-need advice on how to help

[katharine]

We have two pet chickens and they have pox. One has it worse and her eye is bad. It is not swollen as in large but it is swollen as in almost shut. It is raw looking and she does scratch it often on her back but sometimes with her foot. What can I do to help. I don't want her to scratch her eye and damage it??

thanks