The etiological distribution of patients.

Table 1: The etiological distribution of patients.

			Tube Type		Total
			PVP	Medpor	Total
Etiology	Traumatic canalicular injury	Count	3	1	4
	Traumatic canalicular injury	%	23.07%	7.69%	30.76%
	Functional obstruction	Count	5	3	8
	Functional obstruction	%	38.46%	23.07%	61.5%
	Punctal atresia	Count		1	1
	Punctal atresia	%	0%	7.69%	7.69%
Total		Count	8	5	13
Total		%	61.5%	38.46%	100.0%