Corneal Foreign Body
- Frequently occurs during grinding and drilling steel without wearing protective goggles.
- Symptoms: foreign body sensation, continuous irritation or ocular pain.
- Variety of objects may accidentally be lodged superficially or embedded deep within the cornea
- Vertical corneal abrasions give clues about upper tarsal embedded foreign bodies
- Metallic foreign bodies often leave rust rings in the surrounding cornea.
- Careful examination of the entire eye to rule out intraocular foreign bodies.
- CT-scanning or MRI (contraindicated when metallic foreign body is suspected).
- Superficial foreign bodies may simply be removed at the slit lamp after instillation of a topical anesthetic using a moist cotton-tipped applicator of fine gauge needle.
- Irrigation is occasionally done to dislodge multiple particles or small fragments.
- Superior tarsal conjunctiva has to be carefully examined, as it is a common location for a hidden foreign body.
- Deeply embedded foreign bodies may be removed with forceps.
- If perforation is suspected, the removal should be done in the OR.
- Every foreign body should be removed unless removal may cause greater damage than allowing it to stay undisturbed.
- Topical antibiotics after foreign body removal.
- Topical non-steroidal anti inflammatories such as ketorolac 0.5% and a short acting cycloplegic for marked ocular discomfort or inflammation and for relief of symptoms.