Could you get one more picture in good light without a shadow? I can see the cloudy pupil, but I can’t tell if the pupil is round, and more characteristics. How long has it looked like this, and how long has she been lethargic? How does the other eye look? She could be mostly blind in the eye. Can you try to get her eating and drinking? I would take her aside to make sure that she is getting enough to eat.
Eye issues can include injuries from scratches or pecking, infection, cataracts which make the pupil appear cloudy, vitamin E or A deficiency, ammonia burns from odors of droppings in the coop, Mareks disease, epidemic tremors as a baby chick, and others.