In the Original Investigation “Validation of the Postnatal Growth and Retinopathy of Prematurity Screening Criteria,”1 published online November 14, 2019, there were errors in the Group Information. The list of Postnatal Growth and Retinopathy of Prematurity (G-ROP) Study Group members has been replaced with a corrected list of Postnatal Growth and Retinopathy of Prematurity (G-ROP) Study Group investigators. The article was corrected online.