First, I'd try to make sure whether or not the eye is missing.
You'll want to clean out that area with Sterile Eye Wash that you get from the first aid section of a pharmacy. You might have to ask the pharmacist. It contains sterile water and boric acid. Or you can get plain saline - also ask the pharmacist. Explain it's for an eye wound.
You'll want to flush the socket thoroughly in case there's any dirt in there. Then use the terramycin opthalmic ointment (yep, same as for horses) in the socket.
Monitor to make sure no flies get in there! Check daily.
If she gets a systemic infection, you can use penicillin or Baytril if your vet will prescribe. Don't use the packages from the store unless they're one of the above.
Any time you medicate you should always use probiotics at the same time.
TSC carries Probios, my absolute favorite for birds. You could also use a horse probiotic (with live cultures, not just byproducts of fermentation) if you have them for your horse. (They're awesome for horses by the way, and help feed utilization and digestion.)
If you medicate using a -mycin or -cycline, never use yogurt or another high dairy probiotic during medication.
