If you have some Terramycin or Erythromycin eye ointment, or just plain Neosporin, Bacitracin, or Triple Antibiotic ointment, put a tiny 1/8 inch dab in her eye twice a day. Chicken vitamins in her water would also be a good idea. Was she vaccinated for Mareks disease? Hopefully it is not that...
She could have a problem with just one eye, or with both. Pecking injuries are common, and some causes of blindness are infections, high ammonia levels from droppings in coop, cataracts, avian encephalomyelitis (AE,) Mareks disease, and vitamin A or E deficiency. It would be a good idea to save...