AIM:To observe the effect of laser therapy combined with disposable lacrimal recanalization catheter(RS model) or dilating lacrimal drainage tube(nasolacrimal canal) for lacrimal duct obstruction in different parts.METHODS:Form January 2011 to December 2013 in our hospital,548 patients(657 eyes) with lacrimal duct obstruction were selected.In these patients,236 patients(298 eyes) with canalicular(or lacrimal duct) obstruction undergone KTP laser combined with RS model disposable lacrimal recanalization cath...