Table 1. Survival of the initially placed device in a cohort of long-term Jones’ tubes users, based on the aetiology for canalicular obstruction.

	Congenital	Post-Herpetic	Trauma	Post-radiation	Facial palsy	Failed surgery	Other known	Other unknown	All causes
Number of eyes	6 (18%)	8 (25%)	2 (6%)	4 (12%)	3 (9%)	4 (12%)	5 (15%)	1 (3%)	33
Total duration of follow-up mean (years); (range)	28.4 (17.2–44.4)	27.2 (20.9–32)	31.4 (30.8–32)	25.8 (18–31.3)	32 (22.5–39.8)	29.5 (20.9–34.5)	34.2 (17–45.7)	36.3 (N/A)	29.5 (17–45.7)
Survival of the first placed tube (years); (range)	16.1 (0.2–44.4)	16.9 (0.5–32)	0.9 (0.3–1.6)	14.5 (0.8–30.3)	0.2 (0.05–0.3)	14.2 (0.2–32.6)	10 (0.1–31.7)	36.3 (N/A)	13.6 (0.05–44.4)