Her left eye might just be a bit affected too by the head injuries. And the eye colour changes slowly to their adult colouring at around 4-5 month of age.
If she was vaccinated against Marek's a test would have positive results. So if you think about having her tested this would be something to...
Looks just like the eye of my Kraienköppe hen that suffered severe head and eye injuries from a hawk attack. When I chased the hawk off her, she seemed dead already, but after picking her up she started to move and looked at me with her intact eye.
After cleaning her up and treating her various...
From what you described of her injuries I would assume she was attacked and her eye issue is probably related to these injuries to her head.
There might be some pressure on the nerve due to swelling of tissue, or the nerve itself could be injured. Only time will tell as the swelling of the...