HPS1 and oculocutaneous albinism: In the current study, (likely) pathogenic variants in the TYR (GenBank: NM_000372.5), OCA2 (GenBank: NM_000275.3), and HPS1 (GenBank: NM_000195.5) genes were identified in 85% (17/20), 10% (2/20), and 5% (1/20) of OCA patients, respectively.