My Husband Was Working Under A Truck And Dust Or

my husband was working under a truck and dust or dibire fell on his eye, went to the doctor they flush, and put some medinice in is eye. the diagnose was foreign body- conjunctive left 930.1 when he left the office all the doctor said its gone. did he have pink eye or was it just irritation of the eye because of the foreign dust (oil, metal chip) because he was grinding undernieth the truck at work?