What is the appropriate immediate treatment for a typical corneal abrasion in an otherwise healthy adult?

Treatment for Corneal Abrasion

Immediate First-Line Treatment

All patients with corneal abrasions must receive topical broad-spectrum antibiotic drops started within 24 hours of injury to prevent bacterial keratitis and ulceration. 1

Antibiotic Selection and Dosing

• For non-contact lens wearers with simple abrasions: Prescribe fluoroquinolone drops (moxifloxacin 0.5% or gatifloxacin 0.5%) four times daily until complete epithelial healing is confirmed, typically 3-7 days depending on abrasion size. 1, 2

• Fluoroquinolones are the preferred antibiotic class because they achieve superior corneal tissue penetration and provide broad-spectrum coverage against both gram-positive and gram-negative organisms. 1

• Consider adding antibiotic ointment at bedtime (such as tetracycline) for additional lubrication and protection, though ointments lack the corneal penetration of drops and should only serve as adjunctive therapy, not monotherapy. 1, 3

Contact Lens-Related Abrasions Require Enhanced Treatment

• Mandatory antipseudomonal fluoroquinolone coverage (moxifloxacin 0.5% or gatifloxacin 0.5%) is required for all contact lens-related abrasions due to dramatically increased Pseudomonas keratitis risk. 1

• Never patch the eye in contact lens wearers—this increases bacterial keratitis risk substantially. 1, 3

• Advise complete avoidance of contact lens wear until healing is confirmed by examination. 1

Pain Management

• Use over-the-counter oral acetaminophen or NSAIDs for residual discomfort as first-line pain control. 1, 2

• Topical ketorolac 0.5% may be added every 6 hours for 24-48 hours only if pain is severe, then discontinue once oral analgesics provide adequate control. 2

• Ketorolac serves only as adjunctive analgesic therapy, not primary treatment, and has no antimicrobial properties. 2

Critical Management Principles: What NOT to Do

• Eye patching is contraindicated as it does not improve pain, may delay healing, and increases infection risk, especially in contact lens wearers. 1, 4, 5

• Avoid topical corticosteroids initially as they delay healing and increase infection risk. 1, 2

• Do NOT use combination steroid-antibiotic drops as initial therapy. 1, 2

• Never use corticosteroids in suspected Acanthamoeba, Nocardia, or fungal infections—they worsen outcomes. 1

• Do not rub the eye as this worsens the injury and causes further corneal damage. 1

Follow-Up Protocol

• Patients with small (≤4 mm), uncomplicated abrasions with normal vision and resolving symptoms may not require follow-up. 5

• All other patients require re-evaluation within 24 hours to assess healing and detect early infection. 1, 5

Red Flags Requiring Immediate Ophthalmology Referral

Obtain emergent ophthalmology consultation for:

• Central infiltrate >2 mm 1
• Significant stromal involvement or corneal melting 1
• Corneal infiltrate with suppuration, necrosis, or feathery margins suggesting bacterial keratitis 1
• High-velocity eye injuries or penetrating trauma 1
• Irregular pupil after trauma 1
• Eye bleeding or loss of vision after trauma 1
• Increasing pain, purulent discharge, or vision changes despite treatment 1

Special Populations Requiring Enhanced Vigilance

High-risk patients include:

• Contact lens wearers (especially overnight wear, overwear, inadequate disinfection, swimming/hot tub use with lenses) 1
• Prior corneal surgery (refractive, cataract, glaucoma surgery, or keratoplasty) 1
• Chronic ocular surface disease (severe dry eye, entropion, lagophthalmos) 1
• Immunosuppression or diabetes 1

Important Caveats and Pitfalls

• Chronic prophylactic antibiotic use promotes resistant organisms and should only be used for finite treatment periods during the healing phase. 1

• Increasing resistance of MRSA and Pseudomonas to fluoroquinolones has been documented, highlighting the need for judicious use. 1

• Patient education is essential: Instruct patients on infection warning signs (increasing pain, discharge, vision changes) and the need for prompt ophthalmologic care if these develop. 1

• The evidence supporting antibiotic prophylaxis is of very low certainty according to a 2025 Cochrane review, though the American Academy of Ophthalmology maintains a strong recommendation due to the potentially severe consequences of untreated bacterial keratitis and the low short-term risk of topical therapy. 6