PURPOSE To study the development over time of the age- and sex-standardized incidence of rhegmatogenous retinal detachment (RRD) in Denmark. METHODS Registry study, based on the Danish National Patient Registry data. End-point: Individuals undergoing the first surgery for RRD. RESULTS During 2000-2016 we identified 11 769 individuals with a primary RRD surgery in either eye. The age- and sex-standardized incidence rate of RRD increased by more than 50% during the study period. We found a significant increase in this incidence rate for both men and women older than 50 years, and in men, but not in women, younger than 50 years (p