DUST MATERIAL BUILT UP ON THE BRIM OF THE EMPLOYEE'S HARD HAT. WHEN EE LOWERED A FACE SHIELD THAT WAS ATTACHED TO HIS HARD HAT THE DUST FELL DOWN ONTO HIS FACIAL AREA. DUST GOT INTO EE'S RT. EYE CAUSING A CORNEAL ABRASION. EYE WAS EXAMINED BY A DR. & EE WAS PRESCRIBED MEDICATION.