AHR and nystagmus 1, congenital, X-linked: We recently described a consanguineous Israeli Arab family with three children affected by Idiopathic Infantile Nystagmus (IIN) and foveal hypoplasia, due to a homozygous stop mutation c.1861C > T; p.Q621∗ in the gene encoding the aryl hydrocarbon receptor (AHR; MIM 600253) (Mayer et al., 2019).