Miner was walking on roadway at cooler, felt something go in right eye, was wearing all required PPE including safety glasses, had no issues with eye rest of work day, eye became irritated during the night, reported incident on 4/24/2018, sent to eye specialist, metal flake removed from right eye, written out of work for 4/24/2018 and 4/25/2018. Full duty 4/26/2018