Incidence and treatment of trachoma in Pakistan.

Geographical Situation of Pakistan The country consists of two wings-East Pakistan and West Pakistanseparated from each other by 1,500 miles of land. By far the greater part of the population (Table I) is concentrated in the relatively small area of East Pakistan in the delta formed by the Ganges and Brahmaputra rivers, which is the most densely populated part in the world and is conspicuous for its high rainfall (77 inches). The climate is humid, winters and summers are mild, and there are no sandstorms. In West Pakistan, which is divided into four provinces, mountain ranges run down the western borders, extending from the Himalayas to the sea, and the basin of the river Indus stretches out in wide plains from the foot of the mountains in the north. The mountainous area includes the North-West Frontier province and Baluchistan, and comprises much desolate, waterless, and sparsely populated country. In the plains lie the Punjab-the land of five rivers, a fertile agricultural area, and Sind, through which run the lower reaches of the Indus,