Kant distinguishes between the world of noumena, which is the world of things—as they are, and the world of phenomena, which is the world of things—as it appears to us. What the eye forwards to the brain, indeed are mere aspects and hints of impressions that make our vivid visual experience all the more amazing. The brain interprets many rough parallel representations of the world in such a way that it apparently can provide us with the information we seem to need. The visual system is one of the best studied areas of the human brain and every year thousands of newspapers concerning the visual system and Neuro-ophthalmology are published. Besides the progress in knowledge of sensory information processing, the increasing knowledge of the control of eye movements also contributes to the understanding of how the brain works. This progress in Neuroscience has been matched by a comparable increase in research and understanding of pathological conditions. Furthermore, understanding the systems itself and its diseases, Neuro-ophthalmological disorders often are an important clue to the localization of a disease process. Therefore, Neuro-ophthalmology covers an enormously broad range of physiology and pathology of the brain and the eye.

The present book on Neuro-ophthalmology contains 5 sections which subsequently deal with anatomy and physiology, clinical investigations, pathology of the sensory visual pathways, eye movement disorders, non-organic diseases and the autonomic nervous system. All these aspects are covered by several experts in the field of Neuro-ophthalmology. Dr Ashok Garg from India has teamed up with several experts from all over the world to realize this ambitious project.9

After detailed research and according to the need of ophthalmologists, we have developed a series of 10 Volume Ready Reference Books termed as Instant Clinical Diagnosis in Ophthalmology. This series covers Oculoplastic and Reconstructive Surgery, Retina, Lens, Glaucoma, Refractive Surgery, Pediatric Ophthalmology, Strabismus, Anterior Segment Diseases, Cornea and Neuro-ophthalmology. This present series has been designed to provide uptodate information of concerned disease in a comprehensive and lucid manner along with high quality clinical photographs in an easy-to-read format. International Masters of concerned subject have contributed chapters in this series covering pathophysiology, clinical signs and symptoms, investigations, differential diagnosis, treatment and prognosis in a simiplified manner.

The present volume provides complete insight into clinical neuro-ophthal-mology, the knowledge of which is essential for every ophthalmologist in their day-to-day practice. This book gives complete information about diagnosis and management of neuro-ophthalmological conditions in a comprehensive manner and covers anatomical, physiological and neurological aspects of various clinical neuro-ophthalmological diseases. It shall serve as ready reference for ophthalmologists worldwide.

We are highly thankful to M/s Jaypee Brothers Medical Publishers (P) Ltd, New Delhi, especially Shri Jitendar P Vij (Chairman and Managing Director), Mr Tarun Duneja (Director-Publishing) and all staff members for their dedication and hard efforts put in the preparation of high quality series of Instant Clinical Books.

We hope this 10 volume set of ready reference pocket size books shall provide complete and useful clinical information to ophthalmologists all around the world and shall help them to accurately and precisely diagnose, treat and manage their clinical cases confidently to the satisfaction and expectations of their valued patients. We also hope this Ready Reckoner shall serve as useful companion on every clinician's desk.