To describe characteristics and outcomes of primary rhegmatogenous retinal detachment in older adults (age $ 80).Methods: Consecutive patients with rhegmatogenous retinal detachment undergoing pars plana vitrectomy (PPV), scleral buckling (SB), or PPV/SB in the Primary Retinal Detachment Outcomes Study were evaluated. Outcome measures included single surgery anatomic success and visual acuity.Results: Of 2,144 patients included, 125 (6%) were 80 years or older. Compared with younger patients (age 40-79), older adults were more likely to be pseudophakic (P , 0.001), have macula-off detachments (P , 0.001), and have preoperative proliferative vitreoretinopathy (P = 0.02). In older adults, initial surgery was PPV in 73%, PPV/SB in 27%, and primary SB in 0%. Single surgery anatomic success was 78% in older adults compared with 84% in younger patients (P = 0.03). In older adults, single surgery anatomic success was 74% for PPV and 91% for PPV/SB (P = 0.03). The final mean logMAR was lower for older adults (0.79 [20/125] vs. 0.40 [20/40], [P , 0.001]). In older adults, the final mean logMAR for eyes that underwent PPV was 0.88 (20/160) compared with 0.50 (20/63) for PPV/SB (P = 0.03).Conclusion: Octogenarians and nonagenarians presented with relatively complex pseudophakic rhegmatogenous retinal detachments. Single surgery anatomic success and visual outcomes were worse compared with younger patients, and PPV/SB had better outcomes compared with PPV alone.RETINA 41:947-956, 2021W ith the population of older Americans expected to double by 2050, the number of elderly patients undergoing primary rhegmatogenous retinal detachment (RRD) surgery has been projected to grow substantially in the coming years. 1 In particular, the population of octogenarians and nonagenarians is expected to increase from 9.3 million in 2000 to 19.5 million in 2030. 2 These patients will be a critical segment of the population undergoing RRD repair given that the annual incidence of primary RRD is approx-imately 10 to 15/100,000 with a lifetime risk of up to 3% by the age of 85. 3,4 Previous studies have suggested that older age may be a predictor of worse anatomic and visual outcomes after RRD surgery. 5,6 These findings raise concerns about the safety and efficacy of surgical interventions in view of the unique considerations in older adults including anesthesia risks, medical comorbidities, and postoperative positioning. [7][8][9] Currently, published data on outcomes of retinal detachment surgery in older 947