What Should I Do If I Get Metal or a Foreign Body in My Eye?

Someone grinding, hammering, or cutting metal feels a sudden sting or notices the eye watering, and is unsure whether a fragment bounced off or actually went in. Because it may not hurt much, they are tempted to flush it and carry on, and they want to know when a metal fragment in the eye is a true emergency rather than a minor annoyance.

A metal or foreign-body injury can be one of two very different things. A surface foreign body sits on the cornea or under the eyelid, scratching and irritating but staying outside the eye. A penetrating or intraocular foreign body has traveled fast enough to pierce the wall of the eye and enter it, an open-globe injury.

High-speed metal is treated so seriously because a tiny fragment thrown off a grinding wheel or struck from metal-on-metal hammering can enter the eye with little pain and a nearly normal-looking surface, then cause damage from within. Beyond the immediate injury and the risk of infection through the entry wound, iron-containing metal left in the eye can, over weeks to months, deposit iron in the tissues (siderosis bulbi), gradually harming the retina and vision. That combination, a subtle presentation with a serious hidden injury, is why imaging and removal, not home treatment, are the right response.

Surface metal foreign bodies, such as a fleck that lands on the cornea, cause pain, tearing, and a foreign-body sensation and often leave a rust ring within a day. These are removed at the slit-lamp by an eye doctor, and the abrasion heals with antibiotic drops. The danger category is the intraocular foreign body, most often from grinding, hammering, drilling, or explosive work, where a fragment penetrates the eye.

Because the entry wound can be tiny and self-sealing, and the front of the eye may look almost normal, an intraocular foreign body is easy to underestimate. Clues include a history of high-velocity metal work, a small corneal or scleral entry point, a distorted or teardrop-shaped pupil, or blood inside the eye. Metallic fragments raise the specific risk of siderosis over time, and any penetrating injury carries a risk of a severe internal infection (endophthalmitis) if untreated. This is why the standard of care is imaging, protective coverage, antibiotics, tetanus coverage, and removal in the operating room, rather than any attempt to deal with it at home.

Treat it as an emergency, and go to an ER, if any of the following apply:

• The fragment came from grinding, hammering, drilling, or another high-speed source.
• Something is embedded in the eye or feels stuck and will not flush out.
• You see a cut in the eye, a teardrop-shaped or off-center pupil, blood inside the eye, or fluid or jelly leaking out.
• Vision is reduced, or there is significant pain and light sensitivity.
• Even mild symptoms after possible high-velocity metal exposure, because a penetrating fragment can present quietly.

The doctor asks exactly what work was being done and whether metal was involved, since that drives the whole workup. Vision and pupils are checked, and the eye is examined carefully at the slit-lamp for an entry wound, a shallow anterior chamber, a hyphema, or an abnormal pupil, taking care not to press on a possibly open globe. When a metal fragment might be inside, a CT scan of the orbit is the key test to locate it; MRI is avoided because a magnetic fragment could move. The lid is flipped and the surface searched for a retained particle, and the retina is examined when the eye can be safely dilated.

A surface metal fleck is removed at the slit-lamp and any rust ring is cleaned away, followed by antibiotic drops while the abrasion heals. A foreign body that has penetrated the eye is managed as an open-globe emergency: the eye is protected with a shield, antibiotics are started, tetanus status is updated, and the fragment is removed surgically in the operating room, with the wound repaired and the eye monitored for infection and for siderosis afterward. The specific plan always depends on where the fragment is and what it has damaged, which is why an exam and imaging come first.

• Do not try to remove metal, glass, or anything embedded or possibly penetrating, from the eye yourself.
• Do not rub the eye or press on it; shield it loosely without any pressure.
• Do not use tweezers, a swab, a magnet, or your fingers to dig at the eye.
• Do not flush the eye if a high-velocity fragment may have penetrated it, protect it and go.
• Do not be reassured by mild pain or a normal-looking eye after grinding or hammering metal, and do not delay until morning.

If a fragment may have entered your eye, especially from grinding or hammering metal, shield the eye and go to the nearest emergency room now; you can call May Eye Care Center on the way so the team is ready. A small surface speck that flushes out and leaves the eye comfortable can be watched, but any embedded object, high-speed metal exposure, or lasting pain and blur needs prompt care. Patients in the Hanover area can reach the office to arrange urgent evaluation.

Do not try to remove embedded or high-speed metal from the eye, shield it and get emergency care, because a penetrating metal fragment can hurt little yet threaten your sight and needs imaging and surgical removal.