Comparison 3. One iStent versus two iStents.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Proportion of participants who were drop‐free	1		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
1.1 At ≤ 6 months	1		Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
1.2 At 6 to ≤ 18 months	1		Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
1.3 At 18 to ≤ 36 months	1		Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
1.4 At > 36 months	1		Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
2 Mean change in intraoperative pressure	1		Mean Difference (IV, Random, 95% CI)	Subtotals only
2.1 At 6 to ≤ 18 months	1	69	Mean Difference (IV, Random, 95% CI)	0.0 [0.0, 0.0]