The presented book forms premier reference towards practical knowledge on optical coherence tomography. This book is designed to provide accurate, authoritative information about Retina, Choroid and Glaucoma. The retinal and choroidal layers of the eye are easily explored. The method with which these images can be acquired has modified the diagnostic strategy. OCT is useful for better diagnosis and management of ocular conditions. Modern OCT generates high quality images and improves visualization of outer retina and choroid. Three dimensional OCT enables assessment of multidimensional pathology. Each chapter in the book represents a theme related to OCT which enlightens the reader to grab the necessary information of the subject. In current scenario, an exponential increase of the quantity of data has resulted in classifying, sift, assess, count, and preserve the OCT information and most operators in everyday work use only a small part of OCT possibilities. Hence this book forms the excellent source as a hand book in evaluating various types of OCT disorders.