- Published on
Ophthalmology – Conjunctival and Corneal Foreign Bodies
Conjunctival and corneal foreign bodies are among the most common ophthalmic emergencies, typically involving small particles such as metal, dust, or organic material that become lodged in the conjunctiva or cornea. These injuries frequently occur in young males and are often work-related, especially with activities involving power tools or exposure to wind-blown debris. Proper use of protective eyewear is the most effective preventive measure.
Patients usually present with acute eye pain, foreign body sensation, tearing, redness, and photophobia, which are often relieved temporarily by topical anesthetics. A key aspect of history is identifying the mechanism and velocity of injury, as high-velocity injuries (e.g., metal-on-metal) raise concern for a serious intraocular foreign body (IOFB) or globe penetration, which must not be missed.
On examination, findings may include conjunctival injection, eyelid swelling, corneal epithelial defect, or a visible foreign body. Metallic foreign bodies may leave a rust ring, and long-standing foreign bodies can cause inflammation, infection, or corneal necrosis. A careful slit-lamp examination is essential to determine the location and depth of the foreign body. Fluorescein staining helps identify epithelial defects, and the eyelids should always be everted to check for hidden particles. Warning signs such as decreased vision, irregular pupil, hyphema, or shallow/deep anterior chamber should raise suspicion for globe injury or IOFB.
If needed, imaging such as CT scan or ultrasound can help detect intraocular foreign bodies. MRI should be avoided if a metallic foreign body is suspected. A positive Seidel test indicates aqueous leakage and confirms globe penetration.
Treatment begins with careful removal of the foreign body under topical anesthesia using irrigation, a cotton tip, forceps, or a specialized spud. After removal, topical antibiotics (commonly fluoroquinolones) are prescribed to prevent infection. Cycloplegics may be added for associated inflammation, and oral analgesics can be used for pain. Importantly, topical anesthetics should never be prescribed for home use, as they can delay healing and cause corneal damage.
Close follow-up is essential. Conjunctival foreign bodies are typically reviewed in 48–72 hours, while corneal injuries require more frequent follow-up (every 24–48 hours) until healing occurs. The prognosis is generally excellent for superficial injuries, but complications such as infection, inflammation, or corneal scarring can occur if not managed appropriately.
Conjunctival and corneal foreign bodies are among the most common ophthalmic emergencies, typically involving small particles such as metal, dust, or organic material that become lodged in the conjunctiva or cornea. These injuries frequently occur in young males and are often work-related, especially with activities involving power tools or exposure to wind-blown debris. Proper use of protective eyewear is the most effective preventive measure.
Patients usually present with acute eye pain, foreign body sensation, tearing, redness, and photophobia, which are often relieved temporarily by topical anesthetics. A key aspect of history is identifying the mechanism and velocity of injury, as high-velocity injuries (e.g., metal-on-metal) raise concern for a serious intraocular foreign body (IOFB) or globe penetration, which must not be missed.
On examination, findings may include conjunctival injection, eyelid swelling, corneal epithelial defect, or a visible foreign body. Metallic foreign bodies may leave a rust ring, and long-standing foreign bodies can cause inflammation, infection, or corneal necrosis. A careful slit-lamp examination is essential to determine the location and depth of the foreign body. Fluorescein staining helps identify epithelial defects, and the eyelids should always be everted to check for hidden particles. Warning signs such as decreased vision, irregular pupil, hyphema, or shallow/deep anterior chamber should raise suspicion for globe injury or IOFB.
If needed, imaging such as CT scan or ultrasound can help detect intraocular foreign bodies. MRI should be avoided if a metallic foreign body is suspected. A positive Seidel test indicates aqueous leakage and confirms globe penetration.
Treatment begins with careful removal of the foreign body under topical anesthesia using irrigation, a cotton tip, forceps, or a specialized spud. After removal, topical antibiotics (commonly fluoroquinolones) are prescribed to prevent infection. Cycloplegics may be added for associated inflammation, and oral analgesics can be used for pain. Importantly, topical anesthetics should never be prescribed for home use, as they can delay healing and cause corneal damage.
Close follow-up is essential. Conjunctival foreign bodies are typically reviewed in 48–72 hours, while corneal injuries require more frequent follow-up (every 24–48 hours) until healing occurs. The prognosis is generally excellent for superficial injuries, but complications such as infection, inflammation, or corneal scarring can occur if not managed appropriately.
0 Comments
