Optic disc swelling associated with retained metallic intraocular foreign body.

We report a case of a man in his 40s who presented with a swollen optic disc and a metallic intraocular foreign body (IOFB) impacted on the retinal surface of the same eye. The IOFB was removed by vitrectomy and the swelling of the optic nerve slowly resolved. Literature search revealed one previous report of a retained IOFB associated with optic disc swelling as part of an ocular siderosis case series. The possibility that the optic disc swelling in our patient was as a result of a local toxic reaction to the metallic foreign body is discussed.