Excerpt from A Theory of Sight, or How We See and What We See<br><br>Few people are really aware how little is commonly known of the information received through the eye, nor how difficult it is to see correctly. The extraordinary facility in the use of the organ, acquired by incessant exercise, misleads us; and' we imagine that any one is competent to say what is before him. That seeing at sight is, however, not the simple process we are apt to, suppose, the following pages may perhaps serve to show.<br><br>About the Publisher<br><br>Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com<br><br>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.