RCT to compare the surgical success in patients undergoing external dacryocystorhinostomy with intraoperative Mitomycin-C (0.4 mg/ml) Vs Hyaluronic acid 1% (1ml) as adjuvant, To compare the complication rates and wound healing patterns in each group, To Compare change in tear MMP-9 levels from preoperative (within 1 week before surgery) to postoperative (6 weeks after surgery) , To compare the comfort levels of patients in each group.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
1. Lacrimal irrigation test 2. diagnostic probing
Timeframe: 6 months