To the Editor.
—I read with interest the article by Richard M. Robb in the March 1986 issue of the Archives entitled "Probing and Irrigation for Congenital Nasolacrimal Duct Obstruction." I presented a similar paper at the March 1985 annual meeting of the American Association for Pediatric Ophthalmology and Strabismus which was entitled "Timing of Probing and Irrigation for Congenital Occlusion of the Nasolacrimal Duct." The findings noted by Dr Robb's study and my own study were very similar, although our conclusions were quite different.Dr Robb reviewed the results of probing for congenital nasolacrimal duct obstruction in a series of 107 patients. In those patients younger than 1 year he found that 40 of 42 (95%) could be cured with a single probing, while the remaining twopatients were cured after a second probing. In those patients older than 1 year, he found that 57 (87%) of 65 patients
Mittelman D. 'Probing and Irrigation for Congenital Nasolacrimal Duct Obstruction'. Arch Ophthalmol. 1986;104(8):1125. doi:10.1001/archopht.1986.01050200031021