SynopsisCodesLook ForDiagnostic PearlsDifferential Diagnosis & PitfallsBest TestsManagement PearlsTherapyReferences

Information for Patients

View all Images (12)

Emergency: requires immediate attention
Corneal foreign body - External and Internal Eye
Other Resources UpToDate PubMed
Emergency: requires immediate attention

Corneal foreign body - External and Internal Eye

Contributors: Lauren Patty Daskivich MD, MSHS, Brandon D. Ayres MD, Christopher Rapuano MD, Harvey A. Brown MD, Sunir J. Garg MD
Other Resources UpToDate PubMed


A corneal foreign body is a small foreign body on the surface of or embedded in the corneal stroma. A foreign body on the cornea is often associated with ocular trauma, which is most common in young male patients. Very often, the patient was not wearing protective eyewear at the time of injury.

Patients will typically present with severe ocular discomfort, complaining of a foreign body sensation, tearing, and, at times, reduced vision. Patients will almost always be able to relay exactly when the object, and sometimes what object, came into contact with the eye. At times, the patients will even be able to see the foreign body on the cornea. It is essential to check the vision in both eyes.

Ocular siderosis can occur when a foreign body deposits iron in the eye. Typically, iron granules are most prominent in the deeper cornea, but they may be deposited in any corneal layer. Ocular siderosis can develop days to years after the inciting trauma.


T15.00XA – Foreign body in cornea, unspecified eye, initial encounter

37450000 – Corneal foreign body

Look For

Subscription Required

Diagnostic Pearls

Subscription Required

Differential Diagnosis & Pitfalls

Best Tests

Subscription Required

Management Pearls

Subscription Required


Subscription Required


Subscription Required

Last Reviewed:06/26/2019
Last Updated:12/27/2022
Copyright © 2023 VisualDx®. All rights reserved.
Emergency: requires immediate attention
Patient Information for Corneal foreign body - External and Internal Eye
Print E-Mail Images (12)
Contributors: Medical staff writer


A corneal foreign body occurs when the cornea has a piece of foreign matter lodged in it. The most common types of foreign bodies include particles of dust, debris (eg, metal, wood), paint chips, and plant materials.

Who’s At Risk

A person with a corneal foreign body is usually one who failed to use proper eyewear protection while working under risky conditions. Using a grinding or drilling device with metal, cutting or scraping wood, working in the garden, high wind conditions, and being in dusty or debris-laden areas are all considered risk areas, and the wearing of protective eyewear is mandatory. A corneal foreign body can also result simply from walking down the street or riding in a car with the top or window down.

Signs & Symptoms

Sometimes, one can look directly at the eye and see the foreign object embedded in the cornea. However, it is the feeling of something in your eye that will not wash out that typically suggests you may have a corneal foreign body, plus any or all of the following:
  • Sharp pain
  • Burning
  • Scratchy feeling
  • Excessive tearing
  • Blurred vision or vision loss
  • Redness of the eye
  • Blood on the white of the eye
  • Sensitivity to light
  • Difficulty opening the eye

Self-Care Guidelines

As with corneal abrasions and recurrent erosion of the cornea, self-care includes:
  • Never rubbing the involved eye at any time.
  • Using artificial tears to bathe the eye.
  • Using clean water to gently rinse the eye.
  • Using sunglasses to reduce light sensitivity.
  • Trying to keep the eye shut after gentle rinsing.
  • Gently removing a contact lens, if present, and leaving it out until the eye is healed.
Remember that taking precautions like wearing protective eyewear will significantly reduce your risk of corneal foreign body.

Often, simply rinsing the eye will eliminate the corneal foreign body. Another measure to try is to gently pull the upper eyelid over the lower eyelid and release gently. This maneuver will often dislodge the foreign body so that it will wash out. Contact lens wearers should always have a back-up pair of glasses for when contact lenses shouldn't be worn.

More information can be found about corneal abrasions and recurrent erosion of the cornea in their respective diagnoses.

When to Seek Medical Care

All children with a suspected corneal foreign body need medical evaluation. Adults should seek medical attention if self-care measures have not helped or if:
  • The suspected foreign body is metal, plant, or wood, especially if it came in contact with the eye with significant velocity.
  • You or an observer can see the object still embedded in the cornea.
  • There is persistent pain that is increasing.
  • There is progressive worsening of vision or initial significant loss of vision.
  • There is any bleeding, either on the surface of the eye or around the eye.
  • There is mucoid, pus, or bloody discharge.
  • Symptoms persist beyond 24 hours despite having already removed the foreign body.


Most often, the physician will be able to remove the corneal foreign body with very simple instruments. And, following that removal, you will probably be treated with antibiotic drops during the day and antibiotic ointment at night for a few days to prevent infection. However, if the foreign body is too deeply embedded in the cornea or there is evidence of a far more serious injury (such as penetration or perforation of the eye), an eye care professional will be called to care for you. High-velocity foreign bodies can cause very serious damage to the eye, including the possibility of permanent blindness. Be sure to wear the proper protective eyewear when you might be at risk. Lastly, even though you may feel fine, never miss follow-up appointments in case something has gone wrong that you're not aware of.


Yanoff M, Duker JS, eds. Ophthalmology. 2nd ed, p. 1010. St. Louis, MO: Mosby, 2004.
Copyright © 2023 VisualDx®. All rights reserved.
Emergency: requires immediate attention
Corneal foreign body - External and Internal Eye
A medical illustration showing key findings of Corneal foreign body : Eye pain, Photophobia, Conjunctival injection, Excessive tearing
Clinical image of Corneal foreign body - imageId=2985849. Click to open in gallery.
Copyright © 2023 VisualDx®. All rights reserved.