Variants in the retinol dehydrogenase 12 (RDH12) gene are commonly associated with Leber congenital amaurosis (LCA), a severe retinal dystrophy characterised by night blindness, nystagmus and central loss of vision in early childhood, eventually leading to complete blindness in adulthood (Fahim et al., 2019). This evidence concerns the gene RDH12 and pathologic nystagmus.