Transactions of the American Ophthalmological Society

Excerpt from Transactions of the American Ophthalmological Society: Eighth Annual Meeting, Newport, July, 1871 The second disk contains convex glasses Nos. 48, 30, 24, 16, 12, 10, 7. The third disk contains concave glasses Nos. 30, 24, 16, 12, 7, 5, 2; and it is believed that this collection of glasses will be found sufficient to determine the greater num ber of refraction anomalies. The disk rotates behind the opening in the diaphragm, and by means of the spring-catch each glass as it rotates is caused to stop exactly behind the centre of the Opening, and at the same time the arrangement allows of the disk being quickly removed and another substituted - on the same principle as Dr. E. G. Loring, of New York, has made use of in the con struction of his ophthalmoscope, and from whom the idea was derived. The entire apparatus is contained in a box 4% inches long and 1% inch wide. 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.