Yes My Boyfriend Thinks He Might Have Gotten A Small

Yes my boyfriend thinks he might have gotten a small piece of metal flake in his eye while working in the yard cutting scrap metal to haul off this was the evening be for last and his eye is now really irritated red bloodshot and looks like it could possibly be brused pretty badly he tells me that he thinks some could still) be some in the eye won't go to emergency room what can I do for him