Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Visual acuity
RCT	198 eyes with phakic (108 eyes), pseudophakic (70 eyes), or aphakic (20 eyes) rhegmatogenous retinal detachment (RRD), involving retinal breaks within 1 disc diameter of each other located in the superior retina, without severe proliferative vitreoretinopathy (PVR)	Proportion of eyes with visual acuity of 20/50 or better on the Snellen scale 6 months 64/95 (68%) eyes with scleral buckling 90/103 (87%) eyes with pneumatic retinopexy	Significance not assessed
RCT	198 eyes with phakic (108 eyes), pseudophakic (70 eyes), or aphakic (20 eyes) RRD, involving retinal breaks within 1 disc diameter of each other located in the superior retina, without severe PVR	Proportion of eyes with visual acuity of 20/25 12/95 (13%) eyes with scleral buckling 25/103 (24%) eyes with pneumatic retinopexy	Reported as not significant P = 0.05		Not significant
RCT	109 eyes with preoperative detachment of the macula for up to 14 days Subgroup analysis	Proportion of eyes with visual acuity of 20/50 or better on the Snellen scale 27/48 (56%) eyes with scleral buckling 49/61 (80%) eyes with pneumatic retinopexy	P = 0.01	Effect size not calculated	Pneumatic retinopexy