The "System of Ophthalmology" is a comprehensive textbook on the field of ophthalmology, divided into multiple volumes covering various aspects of eye anatomy, physiology, development, and diseases. The first volume, "The Eye in Evolution," explores the evolutionary history of the eye and its development in different organisms. It discusses the effects of light on metabolism, movement, and pigmentation, as well as the emergence of vision. The book is structured into parts and chapters, with detailed illustrations and references to scientific studies. The author, Sir Stewart Duke-Elder, emphasizes the importance of understanding the evolutionary basis of vision and its role in biological and clinical contexts. The text includes discussions on the visual apparatus in invertebrates and vertebrates, the development of the eye in various animal groups, and the functions of the eye in different species. The book also addresses the physiological and psychological significance of vision, highlighting its role in perception and behavior. The work is a foundational text in ophthalmology, providing insights into the evolutionary and functional aspects of the eye.The "System of Ophthalmology" is a comprehensive textbook on the field of ophthalmology, divided into multiple volumes covering various aspects of eye anatomy, physiology, development, and diseases. The first volume, "The Eye in Evolution," explores the evolutionary history of the eye and its development in different organisms. It discusses the effects of light on metabolism, movement, and pigmentation, as well as the emergence of vision. The book is structured into parts and chapters, with detailed illustrations and references to scientific studies. The author, Sir Stewart Duke-Elder, emphasizes the importance of understanding the evolutionary basis of vision and its role in biological and clinical contexts. The text includes discussions on the visual apparatus in invertebrates and vertebrates, the development of the eye in various animal groups, and the functions of the eye in different species. The book also addresses the physiological and psychological significance of vision, highlighting its role in perception and behavior. The work is a foundational text in ophthalmology, providing insights into the evolutionary and functional aspects of the eye.