This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Pt. 1. Essentials Of Refraction And The Diseases Of The Eye; Issue 14 Of Saunders' Question Compends 2 Edward Jackson, Edward Baldwin Gleason W.B. Saunders, 1898 Medical; Ophthalmology; Eye; Medical / Ophthalmology; Nose; Throat

This scarce antiquarian book is included in our special Legacy Reprint Series. In the interest of creating a more extensive selection of rare historical book reprints, we have chosen to reproduce this title even though it may possibly have occasional imperfections such as missing and blurred pages, missing text, poor pictures, markings, dark backgrounds and other reproduction issues beyond our control. Because this work is culturally important, we have made it available as a part of our commitment to protecting, preserving and promoting the world's literature.

This scarce antiquarian book is a selection from Kessinger Publishing's Legacy Reprint Series. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment to protecting, preserving, and promoting the world's literature. Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone!

This scarce antiquarian book is a selection from Kessinger Publishing's Legacy Reprint Series. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment to protecting, preserving, and promoting the world's literature. Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone!

General Books publication date: 2009 Original publication date: 1906 Original Publisher: W.B. Saunders Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. Excerpt: What proportion of the accommodation is available for continuous near work? About two-thirds of the whole. If au effort is made to exert more than this, much of the time, the ciliary muscle and nerves governing it are over-fatigued and symptoms of eye- strain appear. What is presbyopia? The diminution of the power of accommodation by age to such an extent as to interfere with the ordinary use of the eyes for reading, writing, sewing, and similar near work. When does presbyopia usually occur ? Between forty and fifty years of age. Reading, writing, etc. are ordinarily done at a distance of from twelve to eighteen inches, requiring the use of 2 D. or 3 D. of accommodation; and when the total accommodation has so far diminished that this would be more than two-thirds of it, the trouble begins. What are the symptoms of presbyopia ? One of the first is a tendency to hold reading matter further from the eyes than has previously been the custom; things requiring particularly accurate vision, as threading a needle, or reading very fine print, can no longer be done, except in a very good light. After the use of the eyes for close work for a time the thing looked at is apt to become dim, and it is necessary to rest the eyes for a little time. Or there is pain or headache after the use of the eyes for near work, or the eyes become congested, or even inflamed, after such work; such inflammation is often ascribed to "cold." What is the remedy for presbyopia ? The use of the proper convex lenses for all near work. The lens will do a part of the work which would otherwise ...

This scarce antiquarian book is included in our special Legacy Reprint Series. In the interest of creating a more extensive selection of rare historical book reprints, we have chosen to reproduce this title even though it may possibly have occasional imperfections such as missing and blurred pages, missing text, poor pictures, markings, dark backgrounds and other reproduction issues beyond our control. Because this work is culturally important, we have made it available as a part of our commitment to protecting, preserving and promoting the world's literature.

This scarce antiquarian book is included in our special Legacy Reprint Series. In the interest of creating a more extensive selection of rare historical book reprints, we have chosen to reproduce this title even though it may possibly have occasional imperfections such as missing and blurred pages, missing text, poor pictures, markings, dark backgrounds and other reproduction issues beyond our control. Because this work is culturally important, we have made it available as a part of our commitment to protecting, preserving and promoting the world's literature.