Ophthalmology is a branch of medicine dealing with the diagnosis, treatment and prevention ofdiseases of the eye and visual system. An ophthalmologist is a medically trained doctor who commonlyacts as both physician and surgeon. Trachoma is a chronic keratoconjunctivitis caused by four ocularserotypes A, B, Ba and C of organism Chlamydia trachomatis. It is a disease of underprivilegedpopulations living in poor conditions of hygiene. The purpose of this study was to examine whetherretinal vascular calibers are associated with malnutrition in elderly subjects free of cardiovasculardiseases. In the discipline of Community Ophthalmology, the new cadre of personnel known as eyehealth care workers, eye health care educators or ophthalmic assistants are trained to provide eye careand blindness prevention services at the village or door-to-door level. This book provides the basicclinical knowledge of Ophthalmology to undergraduate students. It describes all the basic aspects thatare important for a beginner and highlights the Tropical ophthalmic diseases besides trachoma, malnutrition and community ophthalmology.