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誗AIM: To evaluate the therapeutic efficacy of Nd: YAG laser on lacrimal duct obstruction and the different efficiency of obstruction on different location. 誗 METHODS: Totally 920 eyes (840 patients) with no dacryocystitis received Nd:YAG laser treatment, including 134 eyes with lacrimal canaliculus obstruction and 786 eyes with naso-lacrimal duct obstruction. Every case received 4 days蒺 lacimal duct wash by Poly Pred or Tobradex. Patients in two groups were followed up for 3 months.fatcat:ba3kxg7qafbcng7l2vxodkmnwy