To evaluate the nature of the obstruction in difficult irrigation after probing in congenital nasolacrimal duct obstruction

In a prospective interventional study, the nature of the obstruction in 75 eyes of 68 children aged 12-23 months with congenital nasolacrimal duct obstruction who had difficult irrigation after probing was evaluated. All patients underwent Monocanalicular Silicone intubation.The nature of the obstruction was classified by the surgeon as simple or complex.

Nasolacrimal duct intubation performed in 75 eyes of 68 patients with nasolacrimal duct obstruction. The mean age of patients was 15.92 3.7 months (12-23). 38 of 75 eyes (50.7%) had simple obstruction, 37 of 75 eyes (49.3%) had complex obstruction. So there was no significant difference in incidence of simple or complex obstruction (p=1).

It seems that the nature of obstruction was not a predictive factor for difficult irrigation after probing.