Optical Coherence Tomography is the best way of determining the anatomic effect of a treatment. It can be used to identify and quantify macular edema, and to measure retinal thickness changes in response to therapy. It helps in making clinical decisions and also in patient education and medical record documentation. This book summarizes the present knowledge of optical coherence tomography in various medical and surgical management of disease of retina. The value of this book lies in the clinical experience and expertise of the contributing authors. Optical coherence tomography is the beginning of a new imaging revolution. New technology including ultrahigh resolution optical coherence tomography or combined optical coherence tomography and scanning laser ophthalmoscope technology or fusion technology of optical coherence tomography and ultrasonography will increase our insight into the pathophysiology of retinal disease, better define indications for surgery, help plan the operative procedure and assess the outcome.