Ophthalmology is a specialized area within medicine which focuses on the diagnosis, treatment and prevention of disorders related to the eyes and visual system. The eyes are complex organs responsible for vision, and maintaining their health is crucial for optimal visual function. Some of the eye conditions which are dealt with under this field are refractive errors, cataracts, glaucoma, macular degeneration and diabetic retinopathy. It also addresses other eye conditions, such as dry eye syndrome, eye infections, corneal disorders, retinal detachments, and ocular tumors. It makes use of various diagnostic tools and techniques, including visual acuity tests, slit-lamp examinations, fundus photography, optical coherence tomography (OCT), and angiography, to assess and diagnose eye disorders accurately. This book includes some of the vital pieces of work being conducted across the world, on various topics related to opthalmology. It will serve as a valuable source of reference for graduate and postgraduate students.