Genes that may cause these diseases include the following: GPR143 (OA1), CACNA1F (OA2 or Aland Island eye disease, OMIM #300600), TYR (OCA1A and 1B, OMIM #203100 and #606952, respectively), OCA2 (OCA2, OMIM #203200), TYRP1 (OCA3, OMIM #203290), SLC45A2 (OCA4, OMIM #606574), SLC24A5 (OCA6, OMIM #113750) and C10orf11 (OCA7, OMIM #615179). This evidence concerns the gene SLC45A2 and Åland Islands eye disease.