Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Disease progression
[20] RCT	158 people (158 eyes) with synechial primary angle-closure or primary angle-closure glaucoma (absolute numbers of each not reported) In review [19]	Median best corrected visual acuity (BCVA, quartile range) 1 year 0.20 logMAR units with laser peripheral iridoplasty plus laser peripheral iridotomy 0.20 logMAR units with laser peripheral iridotomy alone	P = 0.431		Not significant
[20] RCT	158 people (158 eyes) with synechial primary angle-closure or primary angle-closure glaucoma (absolute numbers of each not reported) In review [19]	Visual field mean deviation (categorised as <6 dB, 6dB–<12 dB, 12 dB or greater) 1 year with laser peripheral iridoplasty plus laser peripheral iridotomy with laser peripheral iridotomy alone Absolute results not reported	P = 0.674		Not significant