Regardless of what it is, one thing you can do for her which can only help any eye injury/ailment is to do a warm compress with a tea bag (green tea). Heat some water, soak tea bag like you are making tea. Test the warmth on your own cheek. When comfortable, hold onto her eye for 10 -15 minutes if possible. Can be done twice a day or as needed.
Green tea has anti-inflammatory properties and it draws out infection and swelling. You can use the tea in the cup to add a few drop to her water bowl as well. I've used this method on newborn chicks (that mama hen pecked almost to death), and 2 other of my chickens that had gotten eye injuries or respiratory problems. Never had infections set in and they healed nicely.