Fig. 6 The blood supply of the eye. K, branch of short posterior ciliary to the optic nerve; I, anastomoses between choroidal and central vessels. In the case of the artery this is capillary only; s, vein from ciliary muscle to vena vorticosa; t, branch of anterior ciliary vein from ciliary muscle; o, recurrent artery. (From Meyer PAR. Eye 1989;3:121, with permission)