EMPLOYEE WAS GRINDING OVERHEAD INSIDE THE DRAGLINE TUB EVEN THOUGH HE WAS WEARING A FACE SHIELD HE THOUGHT THAT HE HAD GOTTEN SOMETHING IN HIS EYE. HE USED FIRST AID PROCEDURE TO REMOVE IT. LATER THAT DAY HIS EYE STARTED TO BOTHER HIM & HE WAS TAKEN TO AN OPTOMETRIST WHERE A RUST RING WAS REMOVED.