Ophthalmology is a branch of medical science which deals with the study of eyes, treatment of disorders and diseases related to eyes and visual system. Ophthalmologists treat various diseases like myopia, farsightedness, astigmatism, presbyopia, cataract, glaucoma, etc. This branch of science has many sub-fields namely medical retina, ophthalmic pathology, refractive surgery, vitreo-retinal surgery, ocular oncology, etc. This book provides comprehensive insights into the field of ophthalmology. It will provide interesting topics for research which readers can take up. This text presents researches and case studies performed by experts across the globe. It will serve as a reference guide to a broad spectrum of readers. Students, doctors, ophthalmologists, scientists, researchers and all associated with this field will benefit alike from this book.