Welcome to BYC. Are you seeing bubbles in the eyes of the two pullets with eye issues? Or do you think the eye issues are strickly from pecking injuries? Mycoplasma or MG, a respiratory disease, can cause eye bubbles, sometimes swelling around the eye and pinkeye, and may cause gasping, coughing, and rattly or wheezy breathing.
Have you seen any runny poop with mucus or blood in the sick orpington, and is she eating? I would worry that she may have starting signs of MG or possibly, coccidiosis. Coccidiosis can be found if you take some fresh droppings to your vet for a fecal test, or you can treat them all with Corid in the water. Corid is sold at most feed stores and TSC. Dosage is 2 tsp of the liquid or 1 1/2 tsp of the powder per gallon of water, changed daily for 5 days.
If you believe that this is more of a respiratory disease, you can treat with Tylan 50 injectable given ORALLY 1/4 ml per pound 3 times a day for 5 days. If it is just a peck wound, clean the eye with saline and use some Terramycin eye ointment twice a day. The Terramycin is alo good for MG treatment of the eye.