Employee was cleaning the feedshelf in tower area and got dust in his eyes. He flushed immediately and reported. It was treated as a first aid. 2 days later, on his day off, it was bothering him. He went to doc and they removed a spec of grit from his eye. HE DID NOT REPORT TO MGMT THAT HE HAD GONE BACK TO THE DOC UNTIL TODAY 11/7/2011