The book "The History of Iridotomy: Knife-Needle Versus Scissors - Description of the Method with the Formation of the V-shaped Vietnam Syndrome" by Ziegler, S. Lewis (Samuel Lewis) is an important work for specialists in the field of ophthalmology. The author pays much attention to the historical aspects of iridotomy, highlighting and comparing methods using knife-needle and scissors. The method of forming the V-shaped Vietnamese syndrome, developed by the author, is an important step in improving the procedure. Ziegler describes the processes and techniques of his method in detail, giving readers a better understanding of iridotomy. This book will be a useful resource for ophthalmologists interested in the history and current techniques of this field.