In the world of medicine, there is only one constantchange. Therefore, it has been essential to bring out the sixth edition of this book. Ophthalmology has changed considerably over the years, especially with the advancement of technology, which reflect the improvement in surgical techniques, innovation in treatment regimens, and even in the way we diagnose and manage diseases. The highlights of this edition are plenty of new colored diagrams and photographs, latest medical and surgical management of some diseases, and updates on newer investigations. The new look and the use of American spelling is to make the book reach out to a wider range of international readers. However, a few things have not changed in this edition, like its predecessors, is in four color. The bulleted format of the book, detailed illustrations, a selection of slit-lamp examination, and such features which facilitate revision have been retained. This book consists of total 28 chapter and presents a brief discussion on embryology and anatomy of eye, physiology and neurology of vision, ocular pharmacology, refractive errors, diseases of eyelids, conjunctiva, cornea and sclera, uvea, lens, vitreous, retina, optic nerve, orbit, and lacrimal apparatus, ocular injuries, common eye surgeries, blindness and its prevention, surgical instruments used in ophthalmology, etc.