This second Glaucoma volume of the Essentials in Ophthalmology series, as in the first, provides a picture of recent progress in the field of glaucoma, in both basic clinical research and applied clinical science. Its intention is not to replace textbooks on glaucoma, but to serve as a conceptual bridge between original research and textbook presentation. The volume encompasses: Frequently unmentioned aspects of therapy including adherence, persistence and health economics. An update on electrophysiology and its relevance to glaucoma diagnosis and monitoringAspects of glaucoma management, such as risk calculation and tube shunt procedures. New aqueous outflow concepts. A look into the future of glaucoma medical therapy. The editors have set out to provide the reader with diverse and interesting topics reflective of the evidence-based, modern approach to the field of glaucoma.