ow, problem, i'm sorry can't help with chicks, i got my roo eye injured till his eyes can't be opened at all after a fight with other of my roo, and i just rub it using water, feed him better and i opened his eyes slowly and keep rubbing it to open it, and finally the eyes can open and functioning well but still short look and after 2-3 days all is normal again.
but i don't know about chicks' eye, hope anyone can help you.