OCA2 and oculocutaneous albinism type 2: Research has suggested that oculocutaneous albinism type 2 may be caused by mutations in the OCA2 (pink-eye dilution homolog) gene, resulting in diluted phenotypes (Reissmann & Ludwig, 2013) and sequence variations in OCA2 showed additional association with eye color (Mengel-From et al., 2010).