Pterygium is a triangular-shaped growth of fibrovascular tissue that grows from the conjunctiva towards the cornea in the interpalpebra which is degenerative and invasive. According to the 2013 Riskesdas, the prevalence of pterygium in the Riau Islands was 5.8% and 5.0% in Natuna Regency. The aim of this study was to determine the incidence of pterygium, distribution and differences in age grou…