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A form of congenital stationary night blindness, a non-progressive retinal disorder characterized by impaired night vision or in dim light, with good vision only on bright days. CSNB1I patients present with night blindness from infancy or early childhood. Visual acuity is preserved, but some patients have color vision and/or visual field defects. Progression to mild retinitis pigmentosa may occur. CSNB1I inheritance is autosomal recessive.




Congenital stationary night blindness


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