EMPLOYEE WAS IN THE PROCESS OF CLOSING DUMP VALVE. HE FINISHED BY HAND AND WAS GOING TO ""SEAT"" THE VALVE WITH A SLEDGEHAMMER. WHILE ""SEATING"" THE VALVE, HE FELT SOMETHING GET IN HIS RIGHT EYE. HIS EYE WAS IRRITATED WHEN HE ARRIVED AT THE PLANT MEDICAL DEPT. HIS EYE WAS IRRIGATED. AN OPTHOMOLOGIST PRESCRIBED ANTIBIOTICS. EMPLOYEE IS NOT LOSING TIME AND IS NOT ON WORK RESTRICTIONS.