Retinal dystrophy Nyctalopia Early-onset non-progressive night blindness SNOMEDCT_US:232061009 Congenital stationary night blindness UMLS:C3551052 Night blindness, congenital HP:0007684 HP:0007861 A usually nonprogressive (i.e., stationary) form of night blindness with early (presumed to be congenital) onset. UMLS:C4048798 HP:0030641 HP:0030640 HP:0007642 UMLS:C1306122 Night blindness, stationary Night blindness, congenital stationary Night blindness, congenital stationary, complete Congenital night blindness Night blindness since birth HP:0030639 HP:0030638 HP:0007953 Congenital stationary night blindness is the result of either dysfunction of the rod photoreceptors or synaptic transmission. This term was previously called Congenital stationary night blindness. The terms hemeralopia and nyctalopia are deliberately not used, as they mean different things in different languages. The fundus can be either normal or abnormal, such as fundus with white dots in fundus albipunctatus, or a golden sheen in light-adapted state in Oguchi disease, which disappears with dark-adaptation (Mizuo-Nakamura phenomenon). SNOMEDCT_US:193687000