This third volume of 'Uveitis and Immunological Disorders' in Essentials in Ophthalmology provides up-to-date, relevant information for the reader. Our knowledge and understanding of immune mechanisms has increased exponentially over the past few years and has expanded to disorders such as diabetic retinopathy and macular degeneration. This volume will provide the ophthalmologist with practical information on how to diagnose and treat these difficult, and in some cases, blinding disorders. In addition, there are important discussions of the mechanisms underlying these conditions, which incorporate the most recent, up-to-date research material available. 'Summary for the Clinician' and 'Core Messages' sections enhance the value of each chapter. This volume was written by authors who are leaders in their field. Important and provocative questions dealing with recent developments are raised. Topics covered include: Matching in Penetrating Keratoplasty Acute Anterior Uveitis and HLA-B27: What's new? What can the aqueous humour tell us about Uveitis? Is Diabetic Retinopathy an inflammatory disease ? Steroid sensivity in Uveitis Multiple Sclerosis and Uveitis Inflammation in Age-related Macular Degeneration: what is the evidence? Immunological factors in Age-related Macular Degeneration: what is the consequence ? Patterns of Retinal Vascular Involvement in the diagnosis of Retinal Vasculitis Masquerade syndromes This highly practical and clinically relevant volume is valuable to all those involved in the handling and treatment of patients with ocular inflammation. In addition, it provides fresh perspectives and insights into our current understanding of common disorders such as diabetic retinopathy and macular degeneration.