THE EE WAS USING A 4 1/2"" PORTABLE GRINDER DURING THE DAY. HE WAS WORKING IN THE CHUTE @ 2A TO 4 CONVEYOR ALSO @ THE TAIL OF #4 BELT. SOMETIME DURING THESE OPERATIONS, 2 METAL PARTICLES GOT IN TO HIS LEFT EYE. HE DID NOT NOTICE ANY IRRITATION UNTIL AFTER SHIFT WHEN HE WAS WASHING HIS FACE. THIS COULD HAVE CAUSED THE METAL TO BECOME STUCK IN HIS EYE. HE WAS WEARING CO. ISSUE SAFETY