7Ciftci F, Ersanli D, Civelek L, Baloglu H, Karadayi K, Gtingor A. Histopathologic changes in the lacrimal sac of dacryocystorhinostomy patients with and without silicone inmbation[J].Ophthalmol Plast Reconstr Surg ,2005,21 ( 1 ) :59-54.
8Tan AD, Rubin PA, Sutula FC, et al. Congenital nasolacrimal duct obstruction[J]. Int Ophthalmol Clin,2001 ;41 (4) :57-69.
9Allen K, Berlin AJ. Dacryocystorhinostomy failure:association with nasolacrimal silicone intubation[J]. Ophthalmic Surg, 1989 ;20 ( 7 ) :486-9.