After treatment of NLDO, what is the recommended follow‑up interval?

• A. 1 week
• B. 1 month
• C. 3 months
• D. 6 months

Answer: (B)

After treating NLDO, the aim is to confirm that tear drainage is functioning and symptoms have resolved once healing has occurred. About one month is the best interval because edema from the procedure has largely subsided, allowing a reliable assessment of duct patency through irrigation or syringing. A shorter interval, like one week, may show a false failure due to lingering swelling, while waiting several months delays identifying persistent obstruction that could prolong symptoms. At the follow-up, evaluate the patient’s tearing and any discharge, perform lacrimal irrigation to test patency, and base next steps on whether the duct remains open and symptoms are resolved. If patency is confirmed and symptoms are gone, routine care continues; if not, consider further intervention.