I just thought I would give an update in case someone with the same issue found this thread later on. It seems her eye is clearing up. I didn't do anything to it; she wouldn' let me touch her head. But upon close examination, it seemed it was the skin around her eye that had peeled away or something. My only guess is it happened in a fight over a worm or something.

But it is darkening. Oh, I did do a water change and kept her in a bowl out of the water overnight one night.