It's really hard to tell from the photos, but whenever anyone says anything about lumps near, over, under or on eyes I think sinusitis. From what I can see it doesn't look very big at this point, often times the eyeball is no longer visible because the lump has gotten so large. If it is sinusitis it amounts to a clogged sinus cavity, if it is not treated it will harden and need to be cut out. The general advice for treating sinusitis is to start with Tylan and if that does not clear it up you can try baytril. You can find both in various forms, doses, and routes, so once you get some, look on Hopkins alternative livestock's website under peafowl medications and you will find instructions for using the type you have gotten. They come in powders, liquids, tablets etc... and different mg. so I cannot tell you how much to use until you purchase some and we know what you have on hand. If it is just a bruise, it should go down in a few days, but I would still get her on some tylan so it doesn't harden if it is a clogged sinus.