This book systematically introduces a wide range of contact lens knowledge, drawing on the latest developments in contact lenses in recent years. This includes topics such as contact lens materials and optical properties; optical testing, classification, use, and key production processes; ocular anatomy and physiology, including complications; fitting, wearing, and care of contact lenses; and the medicalization and scientific management of contact lenses. This book combines systematic and scientific theoretical foundations with strong practical application, making it a valuable reference for medical faculty and students, as well as training materials for professionals.