VEGFA and retinopathy of prematurity: Variation among studies in whether one or two eyes were treated made comparisons less relevant, which may reflect the unilateral schedule used in the historically influential Cryo-ROP study.50 However, Swedish registers indicate that bilateral treatment is common (76% of initial treatments and 97% overall)47 and that retreatment is more frequent among infants with very low gestational age51 and those treated exclusively with anti-VEGF.47