Familial exudative vitreoretinopathy (FEVR) is a rare hereditary vitreoretinal disorder characterized by abnormal or incomplete vascularization of the peripheral retina leading to variable clinical manifestations ranging from no effects to minor anomalies, or even retinal detachment with blindness. The disease is exudative vitreoretinopathy (MONDO_0019516). Also known as: Criswick-Schepens syndrome, FEVR, familial exudative vitreoretinopathy.