Author : Abner Mulholland Rosebrugh
Publisher : Forgotten Books
ISBN 13 : 9780282913588
Total Pages : 40 pages
Book Rating : 4.9/5 (135 download)
Book Synopsis An Introduction to the Study of the Optical Defects of the Eye, and Their Treatment by the Scientific Use of Spectacles (Classic Reprint) by : Abner Mulholland Rosebrugh
Download or read book An Introduction to the Study of the Optical Defects of the Eye, and Their Treatment by the Scientific Use of Spectacles (Classic Reprint) written by Abner Mulholland Rosebrugh and published by Forgotten Books. This book was released on 2017-10-21 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from An Introduction to the Study of the Optical Defects of the Eye, and Their Treatment by the Scientific Use of Spectacles Strictly speaking, there Is no such thing In nature as parallel rays the nearest approach we have to it are the rays Of light we receive from the sun and the fixed stars. Practically, for our purpose how ever, we may consider rays of light parallel that are received by the pupil of the eye from objects that are twenty feet distant or any dis tance greater than that. Pencils of light from objects less than twenty feet distant are more decidedly divergent. 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.