The vorticose veins of the large eyes are a two-branched vein that flows into the cavernous sinus.
Veins The outflow of venous blood from the orbit occurs primarily through the so-called posterior long veins, which are formed by tributaries of the deep veins of the face. Starting from the deep veins, venous blood flows into more superficial ones, then exits into the anterior and internal veins of the head and ends by joining one of the large veins - the anterior cerebral veins or a straight vein without a tributary. Blood from the veins through the anterior and internal veins of the head reaches the venous sinuses of the dura mater. Venous edema from the orbits does not end at the ophthalmic veins, but continues deeper into the tissues and penetrates the sigmoid sinus, where the ophthalmic veins join, providing their direct branch into the system of cavernous sinuses. The terminal mouth of this important venous-venous arch is the greater cavernous sinus.