Looks like Fowl Pox to me. Fowl Pox causes lesions like these on the face and on the comb. Fortunately, it isn't usually that serious and will go away on its own in 4-6 weeks. However, it can make birds uncomfortable and cause them to go off feed. It may also bring on a secondary bacterial respiratory infection.
To help the scabs go away, you can dab iodine on them. Give her electrolytes and probiotics to help keep her immune system strong to ward off a bacterial infection. If you begin to see more bubblieness around the eye, gasping, wheezing, or sneezing, treat with antibiotics. Tylan50, Duramycin, Terramycin, and Erythromycin are all good antibiotics for respiratory diseases.