Kim J, et al. - Using health claim data from the Korean National Health Insurance Service (KNHIS) database, researchers conducted a nationwide retrospective cohort study to assess the incidence and risk factors for retinal detachment (RD) after cataract surgery in the years 2011 to 2015 in Korea. Using Korean Electronic Data Interchange (KEDI) code and Korean Classification of Diseases (KCD)-7 code, patients over 40 years of age who had cataract surgery from 2011 and 2015 in Korea have been retrospectively identified. In total, 2,191,510 eyes in 1,455,968 patients (mean age, 69.19 ± 9.82 years) had cataract surgery from 2011 to 2015 in Korea and 17,351 patients experienced RD (mean age, 60.89 ± 10.21 years). After cataract surgery, the 5-year cumulative risk of RD was 1.19%, and 80.9% of RD occurred within 1 year following cataract surgery. Findings suggested an association of younger age, anterior vitrectomy for posterior capsule rupture, preoperative myopia, male gender, surgery in tertiary referral centers, residence in non-metropolitan area, and lower household income with an increased risk of RD after cataract surgery. Taking into account the risk factors of the patient, the optimal timing of cataract surgery should be determined and adequate pre- and postoperative assessment is required to prevent RD in patients with higher risk.