[Corneal and ocular surface injuries caused by occult foreign bodies]

The first patient complained of red eye, photophobia, and difficulty in eye-opening of the right eye for 5 months. The second patient complained of grinding pain and difficulty in eye-opening of the left eye for 1 week. The third patient complained of repeated red eye and blurred vision in the left eye for half a year. After detailed examination, a blue suture thread approximately 2 mm in length with a knot was found in the mucosal fold of the first patient, a bee sting was embedded in the middle of the meibomian gland duct in the upper eyelid of the second patient, a glassy foreign body was found in the chamber angle at the 6 o'clock position of the third patient. The corneal and ocular surface injury gradually healed with no recurrence after the timely removal of the occult foreign bodies.