You can use some saline or an eye wash, such as Bausch and Lomb Eye Relief to flush the eye, followed by applying a dot of either Terramycin eye ointment, Vetericyn eye gel, or plain Neosporin triple antibiotic ointment twice a day to the eye. I would hold food and water and mushy wet feed up to the beak to make sure your turkey gets enough to eat, especially since the other eye has a cataract. Can you separate the turkeys? Are they both makes? It may be normal behavior for the junior one to challenge the older one if they are males.