In Wojcik's study, researchers did not find any correlation between genotypes or alleles of the NEIL1 rs4462560 and Keratoconus occurrence, however, some associations were observed while combined NEIL1 SNP with gene variants of PARP‐1, POLG, XRCC1 (Wojcik et al., 2014). This evidence concerns the gene XRCC1 and keratoconus.