This first volume of the series Essentials in Ophthalmology aims to give a picture of recent progress in the field of glaucoma, in both basic clinical research and applied clinical science. The volume encompasses (a) genetic aspects of different forms of glaucoma, (b) methods of diagnosis, such as imaging techniques, visual fields, electrophysiology, and ultrasound biomicroscopy, and (c) aspects of therapy, such as the target pressure concept, wound modulation in glaucoma surgery, neuroprotection, treatment of normal tension glaucoma, and the evaluation of nonpenetrating surgery. The editors provide a diversity of interesting topics reflective of the evidence-based, modern approach to the field of glaucoma.