Ozieblo-Kupczyk et al., in a cohort of 30 PIs, investigated the correlation among the plasma concentration of antioxidant system parameters (i.e., superoxide dismutase (SOD), GSH, and GSH–GPX), measured at 1-7-14 days after birth, and the prevalence of ROP. The gene discussed is SOD1; the disease is retinopathy of prematurity.