Abstract
Epiphora, or watering eye, is commonly caused by lacrimal duct stenosis or obstruction. Lacrimal endoscopy is useful not only for observation of the inner lumen of the lacrimal duct but also for direct endoscopic probing of obstructive lacrimal lesions. In this procedure, a fine endoscopic probe can be introduced from the upper or lower punctum of the lids to the orifice of nasolacrimal duct (NLD) into the inferior meatus. The endoscopy procedure usually requires local anesthesia, through infratrochlear nerve block and nasal instillation. The occurrence and distribution of the obstruction sites of NLD were studied using endoscopy. The most frequent obstruction site was the lower portion of NLD. By using endoscopy and silicone tube intubation for NLD obstruction, the success rate of the treatment was improved much greater than without endoscopy. The future and limitations of lacrimal endoscopy are discussed.
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