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This book discusses various aspects of astigmatism. In the past few years, major advancements have been made in the field of astigmatism. This book explores the growth, optics and composition of astigmatism and places this knowledge in the perspective of current management of this form of refractive fault. The objective of this book is to help specialists dealing with astigmatism to comprehend its manifestations and its treatment through optical and surgical strategies. We intend to help our readers understand the defect thoroughly and use it in their respective researches.