Book excerpt: The book focuses on describing the importance of genetics in eye diseases in a comprehensive and concise manner. Mutations in different set of genes have been detected and incriminated in complex mechanisms of causing leading eye diseases such as cataract and glaucoma. This book written by well-established ophthalmologists and geneticists presents a complicated subject in simple and easy to understand manner. Chapters cover the concept of gene therapy which is an emerging subject with high potential. The book includes a separate chapter on genetic counseling, which has become an integral component of ophthalmology. The book will assist the practicing ophthalmologists in early diagnosis of genetic eye diseases as well as help the geneticists in understaning the basic concepts. It will also be useful for students who are preparing for MD, MS, DNB and FRCS examinations.