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The aim of this study is to evaluate the effectiveness of anterior and posterior dacryorhinocystostomy (En-Dcr) by assessing the surgical outcome with a new objective technique, nose sinus manometry. Thirty adult patients presenting nasolacrimal duct obstruction were enrolled in this study and randomly divided in two groups. In group A patients underwent anterior endonasal dacryorhinocystostomy, group B underwent the posterior approach. All patients were evaluated through Nose Sinus Manometry, endoscopic dye disappearance functional te