Of the 6 variants examined, 5 retained evidence of a genotype × UniEdu interaction (P < 0.05 for all variants except KCNQ5 variant rs7744813) and all 6 retained evidence of a genotype × EduYears interaction (P < 0.05) when tested for an association with myopia case-control status (Figs 2 and 3 and S2 Table). This evidence concerns the gene KCNQ5 and myopia.