LAUSR

To evaluate the effect of a topical steroid instillation on recently developed incomplete nasolacrimal duct obstruction (NLDO) evaluated by using anterior segment optical coherence tomography (ASOCT). Forty-nine eyes of 31 patients with incomplete NLDO who developed epiphora within 3 months were recruited and treated with a topical steroid for 3 months. Tear meniscus height (TMH) and area (TMA) were measured by ASOCT. The treatment was considered to be effective when there was improvement of subjective epiphora, normal tear meniscus on slit lamp examination, a fluorescein dye disappearance test with grade 0 or 1, and TMH < 250 μm on ASOCT. The treatment effectiveness and associated factors were analyzed. Treatment was effective in 24 eyes (49.0%) after 6 months of follow-up. TMH and TMA at 3 months were significantly decreased in the effective group on ASOCT (TMH: from 385 to 268 μm, p = 0.002, TMA: from 0.0564 to 0.0266 mm2, p = 0.001, Wilcoxon test). In the effective group, the eyes with normal tear meniscus at 1 month were significantly more frequent than those in the ineffective group (p < 0.001, Fisher’s exact test). No patient in the effective group required further invasive management during 3 years of follow-up. Topical steroid instillation has a significant therapeutic effect on recently developed incomplete NLDO. Additional invasive procedures were avoided in half of the subjects.