Excerpt from Perception of Depth With Disoriented Vision Of the factors underlying immediate depth, disparity and conver gence presume a binocular mechanism, while accommodation may operate when there is but one eye. Normally, however, accommodation is closely related to convergence although the relationship is not absolute and is subject to individual variations. On account Of this relationship and the difficulties of ruling out any Of these variables, the factors Of binocular disparity, convergence and accommodation will be considered as one complex function. 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.