Table 3.

Success rate of Xen surgery

Definition of success	Complete success	Qualified success
IOP ≤ 21 mmHg and ≥ 6 mmHg and ≥ 20% reduction from baseline*	24 (35.3%)	48 (70.6%)
IOP ≤ 18 mmHg and ≥ 6 mmHg and ≥ 20% reduction from baseline*	23 (33.8%)	46 (67.6%)
IOP ≤ 15 mmHg and ≥ 6 mmHg ≥ 20% reduction from baseline*	22 (32.4%)	42 (61.8%)

^*Any additional surgery or laser for intraocular pressure were considered surgical failures but revision or needling of the Xen conjunctival bleb was permitted