Excerpt from Amaurosis: Clinical Lectures on Some of the Principal Diseases of the Eye, Delivered at the New-York Medical College, 1854 Gentlemen! The natural range of the eye almost exceeds belief. The distance of the smallest stars distinctly visible to the naked eye is known to be such, that light, Which trav els at the rate of nearly miles per second, occupies one hundred and twenty years in coming from them to the earth.* The unaided eye, therefore, gives us the survey of a sphere around us of that scarcely conceivable radius. But this power of vision may be materially injured by seemingly small morbid changes, scarcely appreciable or even destroyed by an appa rently unaltered structure of the parts constituting the organ of sight, or may be impeded or annihilated in consequence of met, bid alterations of the functions of the various organs, reacting by means of the vascular or nervous systems on the eye itself. 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.