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As per a study published online August 30, 2018 in JAMA Ophthalmology, probing the lacrimal duct of a child with congenital nasolacrimal duct obstruction between age 9 and 15 months may be reasonable given that the rate of spontaneous resolution plateaued after 9 months and initial probing success declined after 15 months. Compared with the current practice of probing after 1 year of age, this study supports earlier and narrower range of ages for probing.