Ophthalmology is a field that falls under the branch of medicine and surgery. It is concerned with the diagnosis and treatment of eye disorders. Some of the common eye diseases are cataract, glaucoma, macular degeneration, strabismus, proptosis, uveitis, diabetic retinopathy, etc. Some of its common symptoms are blurred and double vision, faded colors, trouble with bright lights, seeing bright floating spots, etc. Eye disorders are diagnosed through specialized eye tests and medical examinations such as ocular tonometry, viscal acuity, ultrasonography, etc. This field makes use of medications, laser therapies and advanced surgeries for the treatment of these eye diseases. Ophthalmology involves certain specialties to deal with certain eye diseases. Some of them are anterior segment surgery, vitreo-retinal surgery, refractive surgery, oculoplastics and orbit surgery. Ophthalmology is an upcoming field of medicine that has undergone rapid developments over the past few decades. This book is compiled in such a manner that it will provide in-depth knowledge about the theory and practice of this field. This book will prove to be immensely beneficial to students and researchers in this field.