This book will be invaluable to all those studying optometry, dispensing optics and physiological optics. The depth of coverage will make it a prime source of information for the qualified practitioner or a prospective researcher in these fields. It includes sections on the side effects of spectacle and contact lens corrections and on the aberrations of the eye. The four chapters on the oculomotor system and stereopsis are intended to provide a foundation for further study. The clinical chapters contribute both to a fundamental understanding of the procedures, together with practical advice gained from many years of work as a practising optometrist. The results of recent research are included, in order to give an insight into possible advances in techniques or explanations of clinical findings. The more theoretical chapters give a clear basis to the underlying theoretical principles, gained from the many years teaching experience of one of the authors.