EE WAS OPERATING BACKHOE (SCOOP IN FRT) WHEN HE FELT SOMETHING IN HIS EYE. HIS FOOT WAS ON BRAKEBUT SLIPPED WHEN HE FELT SOMETING IN EYE MACHINEMOVED FORWARD STRIKING A PIECE OF PROTRUDING MET AL THAT SHATTERED THE GLASS EE HAD SOMETHING IN LEFT EYE & WAS WEARING SAFETY GLASSES AT THAT TIME