This is a prospective, multicentre, nationwide study between 2016 and 2017, to investigate the preoperative ocular factors, surgical techniques (pars plana vitrectomy (PPV) or scleral buckling (SB), or combined procedures) for rhegmatogenous retinal detachment (RRD) and postoperative best corrected visual acuity (BCVA) at six months. The primary outcome was the percentage of eyes that achieved 20/25 vision in all groups. A total of 2192 patients were included (1738-PPV,344-SB, 110-PPV+SB). Risk factors associated with less probability of postoperative BCVA 20/25 were: older age (>70 years, OR= 0.39), hypotony (<10mmHg, OR= 0.64), high myopia (>-3 dioptres, 0.62), multiple retinal breaks (>4, 0.6) giant retinal tear (>90 degrees, 0.12), extensive RD (>3 quadrants, 0.51) and macular-off (0.36). Preoperative BCVA