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Cornea & External Diseases

















Corneal Abrasion

  • May occur following mechanical or chemical injuries.
  • Usually results from corneal epithelium removal with intact Bowman's membrane.
  • Clinical features:
    • Symptoms: pain, photophobia, foreign body sensation, tearing and history of ocular trauma
    • Signs: fluorescein staining of the epithelial defect
  • Re-epithelialization of the corneal surface usually begins within 24 hours after trauma.
  • The healing process depends on the size of the abrasion, type of injury and limbal function.
  • Management:
    • Debridement of loose epithelium
    • Antibiotic ointment or drops
    • Cycloplegic agent is occasionally added if photophobia or traumatic iritis is present
    • Eye patching can be considered, except in contact lens wearers and trauma involving organic matter
    • For contact lens wearer, antibiotics should include anti-pseudomonal coverage

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