Table of Contents Introduction Basic Aspects of Ocular Blood Flow in Glaucoma: Blood Supply of the Optic Nerve Head. A reality check S.S. Hayreh Update on Nitric Oxide and Endothelin Glaucoma I.O. Haefliger, E.S. Dettmann and J. Flammer Vascular Anatomy of the Anterior Optic Nerve G.A. Cioffi Discussion General and Clinical Aspects of Ocular Blood Flow in Glaucoma: Blood Pressure Monitoring in Glaucoma and Normal Pressure Glaucoma A. Béchetoille and H. Bresson-Dumont Vascular Risk Factors in Glaucoma H.C. Geijssen and E.L. Greve Epidemiology of Normal Tension Glaucoma and the Incidence of Optic Disc Hemorrhage Y. Kitazawa, T. Hayakawa, K. Sugiyama and G. Tomita Discussion Methods to Measure Ocular Blood Flow CDI/OBF: Basic Principles of the OBF System K.-G. Schmidt