Oculocutaneous albinism type 4 (OCA4) is a type of OCA characterized by varying degrees of skin and hair hypopigmentation, numerous ocular changes and misrouting of the optic nerves at the chiasm. The disease is Monarch Disease Ontology entry MONDO_0011683 (oculocutaneous albinism type 4). Also known as: OCA4, SLC45A2 oculocutaneous albinism, oculocutaneous albinism caused by mutation in SLC45A2.