9DELABEY Y M, KHOOSHABEH R. External dacryocystorhinostomy for the treatment of acquired partial nasolacrimal duet obstniction in adults [ J ]. Br J ophthalmol , 2002, 86 ( 5 ) :533-535.
10Kenneedy DW,Bolger WE,Zinreich SJ.Diseases of the sinuses:diagnosis and management.London,B,C.Decker Inc,2001:317-324.
