Culture, Race, Climate, and Eye Disease.

In another most excellent contribution to medicine and ophthalmology, after six years of travel and study, Ida Mann has responded to the urgent need for a world wide investigation of the ecology of disease, in the hope that the knowledge may provide clues to the causation of disease. It is well known that pathological conditions vary throughout the world due to regional vectors, relative racial immunity, race and culture, and climate and geography. The study is timely for the reason that society is changing because of the ease of communication, the spread of knowledge, and industrialization. Consequently, the striking contrasts now to be discovered can be expected to be lost forever ultimately. The application of the world viewpoint is seen in our increasing knowledge of trachoma, which is found in all parts of the earth, the arctic as well as in the tropics, in moist as well as in dry