Aims: Evaluating result of dacryocystorhiostomy by nasal endoscopic Material and method: Prospective, cross-section analysis 5 patients (Primary acquired obstruction of the nasolacrimal duct) underdoing dacryocystorhiostomy by nasal endoscopic From January/2016 to June/2016 in department of ENT and Ophthalmology of Thong Nhat hospital.