This book is designed to provide an ideal introduction to the field of adaptive optics. In the past few years, there has been constant development in adaptive optics techlogy, theory, and systems growth. Lately, there has been an increase in the applications of adaptive optics in the fields of communications and medicine, in addition to its unique uses in astromy and beam transmission. This book elucidates solar astromy, optical vortices, retinal imaging, and many other related topics. It is a compilation of various well researched chapters intended to help its reader in gaining more kwledge regarding this field.