Mutations in TYR, OCA2, TYRP1, SLC45A2, SLC24A5, and LRMDA lead to six different non-syndromic OCA subtypes, they are OCA1, OCA2, OCA3, OCA4, OCA6, and OCA7, respectively (Arveiler et al., 2017). Here, OCA2 is linked to oculocutaneous albinism.