Which therapy has proven benefit in preventing infectious and inflammatory complications after cataract surgery?

Post-Cataract Surgery Therapy: Intracameral Antibiotics with Topical NSAIDs

Intracameral antibiotic injection (specifically cefuroxime or moxifloxacin) combined with topical NSAIDs is the proven beneficial therapy post-cataract surgery, with no additional benefit from topical antibiotics in uncomplicated cases.

Infection Prevention: The Intracameral Antibiotic Standard

The evidence overwhelmingly supports intracameral antibiotic administration as the cornerstone of endophthalmitis prevention:

• Intracameral antibiotics reduce endophthalmitis risk by 79-80% compared to no antibiotic prophylaxis 1, 2
• The most recent Bayesian meta-analysis of nearly 7 million surgeries demonstrated a dramatic risk reduction (OR 0.208; 95% CrI: 0.161-0.268) with 100% posterior probability of clinically meaningful benefit 2
• A 2026 randomized trial of 60,000 eyes showed intracameral moxifloxacin reduced endophthalmitis from 0.05% to 0.02% (2.5-fold risk reduction, p=0.04) 3

The Topical Antibiotic Question

Do NOT routinely add topical antibiotics after intracameral prophylaxis in uncomplicated cases. Here's why:

• High-quality evidence shows topical levofloxacin alone (without intracameral antibiotics) has uncertain benefit (RR 0.72,95% CI 0.32-1.61) 4
• Recent 2026 evidence confirms topical antibiotics provide no additional protection when intracameral antibiotics are used 5
• Topical antibiotics increase antibiotic resistance risk and add unnecessary cost/burden 5

Reserve topical antibiotics only for:

• Complicated surgery (posterior capsule rupture - 11.75-fold increased endophthalmitis risk 6)
• Immunocompromised patients
• Chronic blepharitis
• Any intraoperative contamination concern

Inflammation Control: NSAIDs Are Essential

Topical NSAIDs reduce early postoperative cystoid macular edema (CME) and should be used routinely 1:

• Start perioperatively and continue for 2-4 weeks
• Ketorolac 0.5% is well-studied and effective 7
• The guideline explicitly states NSAIDs reduce early CME incidence, though long-term benefit is unproven 1

Corticosteroid Options

You have two evidence-based approaches:

1. Traditional topical steroids: Dexamethasone 0.1% or prednisolone acetate 1% four times daily, tapered over 2-4 weeks 6, 8

2. Intracanalicular dexamethasone insert: A 2026 study showed equivalent safety and efficacy to topical prednisolone when combined with topical ketorolac, with no difference in rebound inflammation (2.0% vs 2.0%) or CME rates (2.0% vs 2.9%) 7

Practical Algorithm

For uncomplicated cataract surgery:

1. Intracameral cefuroxime 1mg or moxifloxacin 0.5% at surgery completion
2. Topical NSAID (ketorolac 0.5%) starting day of surgery, 4 times daily × 2-4 weeks
3. Topical corticosteroid (dexamethasone 0.1% or prednisolone 1%) 4 times daily, tapered over 2-4 weeks OR intracanalicular dexamethasone insert
4. No topical antibiotics needed

For complicated surgery or high-risk patients:

• Add topical fluoroquinolone (levofloxacin 0.5% or moxifloxacin 0.5%) 4 times daily × 7-10 days
• Consider extending to 14 days if significant risk factors present

Critical Pitfalls to Avoid

• Don't skip intracameral antibiotics - this is the single most important intervention with the strongest evidence 1, 2
• Don't use fixed combination tobramycin-dexamethasone - one study found 5.8-fold higher endophthalmitis risk compared to separate levofloxacin and dexamethasone 6
• Don't reflexively prescribe topical antibiotics - they add no benefit in uncomplicated cases and promote resistance 5
• Don't omit NSAIDs - they have proven CME reduction benefit 1

The evidence hierarchy is clear: intracameral antibiotics are non-negotiable for infection prevention, NSAIDs are essential for inflammation control, and topical antibiotics should be reserved for complicated cases only.