IL2 and myopia: Elevated concentrations of IL-2 and IL-2ra were found to be associated [IVW estimate odds ratio (OR): 1.003, 95% CI: 1.001–1.005, P=0.001] and strongly associated (IVW estimate OR: 1.002, 95% CI: 1.000–1.003, P=0.049) with an increased risk of myopia, respectively.