Modern System of Ophthalmology (MSO) is a series of multiple volumes, planned with a very specific aim to cater to the needs of residents in ophthalmology. Volume editors of this series make a team of like-minded and devoted teachers from different subspecialties of ophthalmology. Theory and Practice of Squint and Orthoptics, in its thoroughly revised and updated fourth edition, helps to embark on a journey of mastery in the fascinating realm of strabismus. This comprehensive textbook is tailored for postgraduate students in ophthalmology. This book seamlessly integrates fundamental principles with advanced concepts, providing a roadmap for those seeking an in-depth understanding of strabismus and ocular misalignment. Salient Features: Comprehensive Coverage: Simplified, well elucidated and profusely illustrated text, comprehensively covers the intricate anatomical, physiological, and neuro-ophthalmic aspects of strabismus. Clinical Decision-making: Navigates through the complexities of patient assessment, diagnostic challenges, and the formulation of personalized treatment plans, honing your clinical decision-making skills. Surgical Expertise: From traditional approaches to cutting-edge minimally invasive techniques, it delves into the latest surgical interventions with surgical pearls. Surgical steps have been elucidated with self-explanatory line diagrams. Equally useful for postgraduate students: Students in ophthalmology, practicing clinicians, optometrists and opticians will find this as an essential guide for unlocking the complexities of ocular misalignment. Prepares to embark on a transformative journey: Provides a wealth of information, not only educates but also inspires a passion for excellence in the ever-evolving field of strabismology; motivates the reader to become an adept and informed strabismologist.