HPS6 and congenital nystagmus: Miyamichi et al. (2016) reported two Japanese sisters, 4-year-old and 6-month-old girls with novel compound heterozygous mutations in HPS6 (c.1898delC and c.2038C>T), with OCA including light brown hair and fair skin, and congenital nystagmus but no platelet dysfunction and no bleeding manifestations [17].