We describe hereditary retinoschisis without foveal retinoschisis in a girl (the product of a consanguineous marriage) and her father. The father had peripheral retinoschisis with dendritic changes of the retina and good visual acuity. The daughter had peripheral retinoschisis complicated by vitreous haemorrhage and retinal detachment. Neither had foveal retinoschisis. The pattern in a scotopic single-flash electroretinogram differentiated this condition from other forms of retinoschisis. We believe that these cases represent the autosomal recessive form of juvenile retinoschisis without foveal retinoschisis.