Refraction and How to Refract: Including Sections on Optics, Retinoscopy, the Fitting of Spectacles and Eye-Glasses, Etc (Classic Reprint) - Couverture souple

James Thorington

Couverture souple

ISBN 10 : 1332040616 ISBN 13 : 9781332040612

Editeur : Forgotten Books, 2016

Synopsis

Excerpt from Refraction and How to Refract: Including Sections on Optics, Retinoscopy, the Fitting of Spectacles and Eye-Glasses, Etc

The chapter on Prisms has been very much enlarged, as the average book on Ophthalmology gives but little information on this branch of refraction, and, to make it more entertaining, the writer has not limited himself to the consideration of prisms in ophthalmic practice alone, and has inserted many illustrations to make the text easy of comprehension. The Author's double prism, a new and delicate test, for the detection of errors of muscular 1mbalance whether of small or great amount, is incorporated in the text. Among the other entirely new matter in this book mention may be made of Retinoscopy without a cycloplegic (chapter Among the deletions are: Schein er's Test; The Pointed Line Test; The Chromo-aberration Test, and Thomson's Ametrometer, all of which are out of date and relegated to the historical.

Many of the illustrations were drawn or photographed by the Author, and the diagrams of astigmatic eyes, as also several others, are original.

A Chinese Edition of Refraction and How to Refract, translated by Dr. James H. Ingram of Tungchou, China, was published in October, 1914.

About the Publisher

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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.

A propos du livre

Présentation de l'éditeur

This book was originally published prior to 1923, and represents a reproduction of an important historical work, maintaining the same format as the original work. While some publishers have opted to apply OCR (optical character recognition) technology to the process, we believe this leads to sub-optimal results (frequent typographical errors, strange characters and confusing formatting) and does not adequately preserve the historical character of the original artifact. We believe this work is culturally important in its original archival form. While we strive to adequately clean and digitally enhance the original work, there are occasionally instances where imperfections such as blurred or missing pages, poor pictures or errant marks may have been introduced due to either the quality of the original work or the scanning process itself. Despite these occasional imperfections, we have brought it back into print as part of our ongoing global book preservation commitment, providing customers with access to the best possible historical reprints. We appreciate your understanding of these occasional imperfections, and sincerely hope you enjoy seeing the book in a format as close as possible to that intended by the original publisher.

Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2016
• Langue: anglais
• ISBN 10: 1332040616
• ISBN 13: 9781332040612
• Reliure: Broché
• Nombre de pages: 431
• Coordonnées du fabricant: Copytech (UK) Ltd, Trading as Printondemand-worldwide.com; gpsr@podww.com; ; 9 Culley Court; Orton Southgate; Peterborough; Cambridgeshire; PE2 6WA; Royaume-Uni
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