Excerpt from Ophthalmic Literature, Vol. 6: August, 1916 For instance, the importance of consanguinity is brought out in connection with statistics of optic atrophy and retinitis pigmentosa. Of the former 76 per cent were children of first cousins; of the latter 72 per cent. Consanguineous marriages seem to be extremely common in Madras. Thus among 434 patients it was found that 60 per cent were children of first cousins; and from the Government Immigration Depot, statistics showed 51 per cent were the children of first cousins. The departure from practice in the Western Hemisphere is illustrated by the statistics of 350 cases in which couching had been done for cataract by the native couchers. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.