EMPLOYEE HAD JUST FINISHED UP GRINDING ON A LOADER BUCKET. HE WAS CLEANING UP THE SURFACE FOR THE ADAPTER TO BE INSTALLED. WHEN HE FLIPPED UP HIS FACE SHIELD DUST ENTERED HIS RIGHT EYE. THE DUST HAD COLLECTED ON THE BRIM OF HIS FACE SHIELD WHILE GRINDING. WHEN THE SHIELD WAS FLIPPED UP THE DUST WENT BETWEEN HIS SAFETY GLASSES AND HIS EYE BROW AND GOT INTO HIS EYE.