Excerpt from The Physiology of Vision The author of the following work has been engaged for more than twenty years in teaching the structure, functions, and diseases of the eye, to medical students. His course of lectures on these subjects being limited to a period of three months, or about sixty lectures, and intended chiefly as a practical course on a branch of the healing art, he has generally been obliged to curtail the very interesting matter of the physiology of vision, more especially of late years, in order that he might do that justice to the anatomical and pathological departments of his subject, which the previous studies of his auditors, their ultimate views in attending to the eye, and the continual improvements taking place in practical ophthalmology, seemed to him to demand. In order to supply in some measure the deficiency arising from this necessary abridgment, he has often been solicited to publish a short systematical work on the physiology of vision. As it is now presented to his pupils and the public, the following treatise is one of very humble pretensions. 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.