Comparison of Medpor Coated Tear Drainage Tube versus Silicon Tear Drainage Tube in Conjunctivodacryocystorhinostomy: Problems and Solutions

Table 2

Various etiologies of conjunctivodacryocystorhinostomy in the study and distribution thereof according to surgical technique (: number of eyes).

Etiology	Silicon tube	Medpor coated tube
	()	()
Idiopathic canalicular obstruction	4	7
Punctum agenesis	1	1
Functional obstruction secondary to external DCR	0	1
Canalicular obstruction secondary to ichthyosis	0	2
Traumatic upper lacrimal system damage	1	0
Upper or middle lacrimal system excision secondary to tumor surgery	1	0
Upper or middle lacrimal system damage secondary to multidiode laser DCR	1	0