[Diagnosis of circulatory disorders in the optic nerve in primary open-angle glaucoma. Communication 1. The circulatory system in the orbital portion of the optic nerve and its anatomic and topographic features].

The review analyzes the implication of ischemia in the pathogenesis of primary open-angle glaucoma. It gives the opinions of leading Russian and foreign specialists who deal with this problem. The basic studies of the morphology of the optic nerve head and its circulatory system are assessed. The specific features of the structure of the orbital arterial system based on the types of ocular arterial branching via formation of intraocular circulation are compared.