EE was working in the finish mill 2. Material fell from above & some dust got into his left eye. He removed a small piece of gypsum & then contacted a first aid responder for assistance with flushing our his eye. 5/21 employees eye was still sore. Referred to specialist to be sure nothing was imbedded in eye. EE had a deep scratch. Was given RX drops to use until seen May 28th.