Autosomal dominant preretinal vascular loops.

Preretinal vascular loops are a congenital malformation usually occurring in otherwise normal fundi. These anomalies consist of vessels, most commonly arteries, that spiral into the vitreous and return to the otherwise normal retinal vascular system. The authors present two members of a family with preretinal vascular loops and two members with other vascular anomalies. The inheritance pattern in this group is autosomal dominant.