Ophthalmology : The word ophthalmology comes from the Greek roots ‘ophthalmos’ meaning eye and logos meaning word, thought or discourse; ophthalmology literally means “the science of eyes”. Ophthalmology is the branch of medicine which deals with the diseases and surgery of the visual pathways, including the eye, , and brainareas surrounding the eye, such as the lacrimal system and eyelids. By convention the term ophthalmologist is more restricted and implies a medically trained surgical specialist. Since ophthalmologists perform operations on eyes, they are generally categorized as surgeons.