What are the recommended eye drops for treating a corneal abrasion in an adult?

Recommended Eye Drops for Corneal Abrasion

All adults with corneal abrasions should receive broad-spectrum topical antibiotic eye drops, particularly if the abrasion is trauma-related or contact lens-associated, and treatment must be initiated within 24 hours to prevent bacterial keratitis and ulceration. 1

Antibiotic Eye Drops (Primary Treatment)

The 2024 American Academy of Ophthalmology Bacterial Keratitis Preferred Practice Pattern provides clear guidance on antibiotic prophylaxis:

• Broad-spectrum topical antibiotics are mandatory for corneal abrasions following trauma or in contact lens wearers 1
• Timing is critical: Start within 24 hours of injury to prevent ulceration 1
• Preferred formulation: Eye drops over ointments, as drops achieve higher corneal tissue levels 1

Specific Antibiotic Options:

FDA-approved fluoroquinolones for bacterial keratitis:

• Ciprofloxacin 0.3%
• Ofloxacin 0.3%
• Levofloxacin 1.5% 1

These provide excellent broad-spectrum coverage including gram-positive and gram-negative organisms. However, note that resistance patterns have increased from 2005-2015, particularly for MRSA and Pseudomonas 1.

Alternative antibiotics mentioned in guidelines include:

• Gentamicin (used in research studies) 2
• Tobramycin 3
• Chloramphenicol (outside US)
• Sulfacetamide sodium

Dosing Strategy:

• Apply 4 times daily for simple abrasions 2
• Continue for 5-6 days or until healed 2

Critical Caveat:

Do NOT patch the eye or use bandage contact lenses in contact lens-associated or traumatic abrasions - this significantly increases the risk of secondary bacterial keratitis 1. This is a common pitfall that can lead to serious complications.

Adjunctive Pain Management Eye Drops

NSAIDs (Nonsteroidal Anti-Inflammatory Drops)

Topical NSAIDs provide significant pain relief and should be considered as adjunctive therapy:

• Ketorolac tromethamine 0.5%: Demonstrated significantly decreased pain (p<0.002), photophobia (p<0.009), and foreign body sensation (p<0.003) at 24 hours compared to placebo 4
• Diclofenac: Effective when combined with antibiotics and contact lens (though contact lens use is controversial) 3
• Indomethacin 0.1%: Reduced pain by 30% at 1 hour and 59% after second dose, significantly better than antibiotic alone (p=0.015) 2

Benefits of NSAIDs:

• Faster return to normal activities 4
• No adverse effects on healing time 4
• Well tolerated with no serious complications 2, 4

Topical Anesthetics (Controversial)

Tetracaine 1% for outpatient use remains highly controversial:

• One 2014 study showed safety when used every 30 minutes while awake for 24 hours 5
• No complications occurred in 59 patients (95% CI: 0-6.1% complication rate) 5
• Patients rated it significantly more effective than placebo (7.7 vs 3.9 on 0-10 scale, p<0.0005) 5

However, this practice is NOT endorsed by current guidelines and remains experimental. The 2026 narrative review highlights ongoing concerns about epithelial toxicity, adherence, and patient safety 6. Most experts recommend against routine outpatient topical anesthetic use.

Cycloplegics

Cycloplegic drops (e.g., cyclopentolate, homatropine):

• Decrease pain from ciliary spasm
• Prevent synechiae formation
• Commonly used as adjunctive therapy 1, 4, 7

One study used cycloplegics as standard care before randomization to NSAID vs placebo 4.

Evidence Quality and Controversies

Antibiotic Prophylaxis Debate:

A 2025 Cochrane review found very low certainty evidence for antibiotic prophylaxis in corneal abrasion 8. The review showed:

• One study suggested antibiotics may increase infection risk (RR 1.32,95% CI 1.03-1.70) 8
• No difference in healing rates at 48 hours 8
• No difference between chloramphenicol and other antibiotic classes 8

Despite this equivocal research evidence, the 2024 AAO guidelines strongly recommend antibiotics based on clinical consensus, particularly for high-risk scenarios (trauma, contact lens wear) 1. This represents a situation where guideline recommendations prioritize prevention of rare but serious complications (bacterial keratitis with potential vision loss) over research showing minimal benefit in average cases.

Ointment vs Drops:

Ointments have poor corneal penetration but may be useful at bedtime for comfort 1. Drops are preferred for primary therapy due to superior tissue levels 1.

Clinical Algorithm

For ALL corneal abrasions:

1. Start broad-spectrum antibiotic drops (fluoroquinolone preferred) within 24 hours
2. Apply 4 times daily for 5-6 days

For significant pain: 3. Add topical NSAID (ketorolac 0.5% or diclofenac) 4 times daily 4. Consider cycloplegic drop for ciliary spasm 5. Oral analgesics as needed

Avoid:

• Eye patching (increases infection risk)
• Bandage contact lenses in trauma/contact lens cases
• Routine topical anesthetics for home use

Follow-up:

• Recheck at 48 hours if not improving
• Most heal within 24-72 hours 7