ANGIOARCHITECTURE OF OPTIC NERVE .2. LAMINA CRIBROSA

Our study confirmed the presence of a rich capillary network which resides in the trabeculas of both the choroidal and scleral lamina. The lamina capillaries can be thought of as lying in a three-dimensional arrangement with most of the meshwork lying transversely, but with capillary intercommunications between the various levels. The vessels of the choroidal portion are coated with glia, while those of the scleral portion are surrounded by a dense connective tissue coat. The major afferent channels are branches of the circle of Zinn-Haller and choroidal arterioles. The efferent vessels drain into the central retinal vein, but drainage into the vessels about the optic nerve is a possibility. © 1969.