Excerpt from Standardization of Some of the Common Tests Used in Determining the Acuteness of ion of School Children: A Thesis
The picture tests were discarded because they were not and could not be constructed according to the Snellen measurements, consequently the results obtained could not be compared with results obtained by tests made with the Snellen letters.
The tests made were divided into two parts. The first had to do with the ibility of the illiterate E, supposed to be seen by the normal eye at no greater distance than 16 ft., as compared with the ibility of the Snellen letters constructed to be seen by the normal eye at no greater dis tance than 16 ft.
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Leopold is delighted to publish this classic book as part of our extensive Classic Library collection. Many of the books in our collection have been out of print for decades, and therefore have not been accessible to the general public. The aim of our publishing program is to facilitate rapid access to this vast reservoir of literature, and our view is that this is a significant literary work, which deserves to be brought back into print after many decades. The contents of the vast majority of titles in the Classic Library have been scanned from the original works. To ensure a high quality product, each title has been meticulously hand curated by our staff. This means that we have checked every single page in every title, making it highly unlikely that any material imperfections – such as poor picture quality, blurred or missing text - remain. When our staff observed such imperfections in the original work, these have either been repaired, or the title has been excluded from the Leopold Classic Library catalogue. As part of our on-going commitment to delivering value to the reader, within the book we have also provided you with a link to a website, where you may download a digital version of this work for free. Our philosophy has been guided by a desire to provide the reader with a book that is as close as possible to ownership of the original work. We hope that you will enjoy this wonderful classic work, and that for you it becomes an enriching experience. If you would like to learn more about the Leopold Classic Library collection please visit our website at www.leopoldclassiclibrary.com
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Vendeur : Forgotten Books, London, Royaume-Uni
Paperback. Etat : New. Print on Demand. This book investigates the acuity of school children's vision and scrutinizes the reliability of various tests used to measure it, including the Snellen test. The author analyzes the Snellen test's history, structure, and its usage, and reveals inconsistencies in the size and style of letters and characters used by different manufacturers. The author then describes the methodology and results of a study comparing the visibility of the illiterate E with the Snellen test letters of the same dimensions. They also evaluate the effectiveness of the Snellen 12 ft., 16 ft. letters, or a dot, against letters to be seen at 20 ft., 30 ft., 40 ft., or 50 ft. The book concludes that the 20 ft. dot test is a reliable test for poor, normal, or acute vision, while the 16 ft. letter test is reliable for detecting severe vision defects. These findings challenge the traditional reliance on the Snellen test and provide valuable insights for improving vision testing methods in schools. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. N° de réf. du vendeur 9781333300524_0
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Vendeur : PBShop.store US, Wood Dale, IL, Etats-Unis
PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur LW-9781333300524
Quantité disponible : 15 disponible(s)
Vendeur : PBShop.store UK, Fairford, GLOS, Royaume-Uni
PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000. N° de réf. du vendeur LW-9781333300524
Quantité disponible : 15 disponible(s)