B757-200
Flight Crew Air Transport Pilot (ATP)
Deviation / Discrepancy - Procedural FAR; Flight Deck / Cabin / Aircraft Event Illness / Injury
General Physical Injury / Incapacitation
Human Factors
I flew after becoming aware I had something in my eye. I had flown two prior legs in the same condition; but had just discovered the cause of my eye irritation and I could see the tiny object in my eye.  I had no vision problems and I don't think it affected my ability to perform all my duties and completed the flight uneventfully. At the ER after the flight it was discovered that the item in my eye was a piece of metal. After it was dug out of my eyeball; I was not able to fly the next flight.
B757 First Officer flew a trip after becoming aware of an irritation in one eye; but with no affect on vision. After the trip a piece of metal was extracted from the eyeball.