Mmm, so it's not an ear infection, although she does look a little better in the last pics, I would keep administering the eye cream, and start researching the use of tylan, if there is no further improvement . But the use of antibiotics is a personal choice. Completely up to you. I took a roo to the avian vet with facial swelling like hers, and he had an ear infection. The vet gave me water soluble antibiotics, and as he predicted it was all cleared up in 5 days. That visit cost me $130 .
But at least now I have the antibiotics on hand, and feel confident that I will recognize the symptoms next time.