The third edition retains these features, and the same clarity, and concise yet comprehensive coverage of the subject. However, to take account of recent research and clinical findings the text itself has been extensively revised. In particular chapters Examination of Young Children, an Overview of Sensory Changes in Strabismus, and Nystagmus, have been completely rewritten and a new chapter on Binocular Instability has been included. A further important addition is the comprehensive glossary of orthoptic terminology. This provides much needed information and will be particularly useful for students and those revising for examinations. In this third edition Pickwell's Binocular Vision Anomalies remains essential reading for the student and a prime source of information for all professionals working in the field of orthoptics.