OCA2 and albinism: Twenty-nine (30%) patients had albinism caused by variants in TYR gene, 23 (24%) had OCA2, 14 (15%) had x-linked albinism with variants in GPR143 gene, 13 (13%) had other genetically verified types of albinism and in the remaining 17 (18%) the genetic cause of albinism could not be established.