This book offers a comprehensive guide to the use of glaucoma drainage devices (GDDs) in various clinical settings, and covers aspects ranging from the basics to managing complications. The aim of this work is to provide readers with a practical go-to desktop book to assist in and enhance their surgical competence with glaucoma drainage devices. Starting with the history of GDDs, it addresses various devices, their models and modifications, and highlights their advantages and disadvantages through numerous illustrations. The indications for the drainage devices are discussed in detail, using patient cases with photographs. The book describes the techniques for all devices in detail, which are explained further in accompanyin videos. After covering the basic techniques, the book provides extensive notes on modifications that may be required in various case presentations such as congenital glaucoma, post-penetrating keratoplasty with extensive peripheral synechiae, and procedure through pars plans etc. Complications and their management are subsequently addressed. The book is an essential guide to help surgeons match patients to the most suitable device, and to support patients from preparation through post-operative care. Primarily intended for glaucoma surgeons, it offers a valuable resource for fellows in training, and all who have an interest in glaucoma surgery.