Primary Treatment of Nasolacrimal Duct Obstruction with Probing in Children Younger than 4 Years

In children 6 to <36 months old, probing is a successful primary treatment of NLDO in about three fourths of cases, with no decline in treatment success with increasing age. The study enrolled too few children ages 36 to <48 months to allow a conclusion regarding the probability of treatment success in this age group.