O PTOMETRY FINAL - NOT
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O PTOMETRY FINAL - NOT
AL PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N OPTOMETRY http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management AL PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N To my children, Benjamin, Simon and Daniel Rosenfield, from whom I learn something new every day. Mark Rosenfield To my daughter, Isla, with all my hopes, dreams and love. Nicola Logan For Elsevier: Commissioning Editor: Robert Edwards/Russell Gabbedy Development Editor: Nicola Lally Project Manager: Christine Johnston Designer: Stewart Larking Illustration Manager: Merlyn Harvey Illustrator: Cactus http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N AL OPTOMETRY: Science, Techniques AND Clinical Management Second Edition Edited by Mark Rosenfield, MCOPTOM, PHD, FAAO SUNY College of Optometry, New York, USA Nicola Logan, MCOPTOM, PHD School of Life and Health Sciences, Aston University, Birmingham, UK Contributing Editor Keith Edwards, FCOPTOM, DIPCLP, FAAO Bausch & Lomb, New York, USA Edinburgh London New York Oxford Philadelphia St Louis Sydney Toronto 2009 http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management # Reed Educational and Professional Publishing Ltd, 1988 # 2009, Dr Mark Rosenfield, Dr Nicola Logan and Dr Keith Edwards. Published by Elsevier Ltd. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permissions may be sought directly from Elsevier’s Rights Department: phone: (þ1) 215 239 3804 (US) or (þ44) 1865 843830 (UK); fax: (þ44) 1865 853333; e mail: [email protected]. You may also complete your request on line via the Elsevier website at http://www.elsevier.com/permissions. First edition 1988 Second edition 2009 PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N AL ISBN 978 0 7506 8778 2 British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging in Publication Data A catalog record for this book is available from the Library of Congress Notice Knowledge and best practice in this field are constantly changing. As new research and experience broaden our knowledge, changes in practice, treatment and drug therapy may become necessary or appropriate. Readers are advised to check the most current information provided (i) on procedures featured or (ii) by the manufacturer of each product to be administered, to verify the recommended dose or formula, the method and duration of administration, and contraindications. It is the responsibility of the practitioner, relying on their own experience and knowledge of the patient, to make diagnoses, to determine dosages and the best treatment for each individual patient, and to take all appropriate safety precautions. To the fullest extent of the law, neither the Publisher nor the Editors assumes any liability for any injury and/or damage to persons or property arising out of or related to any use of the material contained in this book. The Publisher The Publisher's policy is to use paper manufactured from sustainable forests Printed in China http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management Contents vii ix xi Foreword Preface Contributors PART 1 Optometric Science Chapter 1 Forming an optical image: the optical elements of the eye W Neil Charman 1 17 Chapter 3 Visual development Carol Westall 37 PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N AL Chapter 2 Anatomy of vision Gary E Baker Chapter 4 The psychology of vision James M Gilchrist 51 Chapter 5 Visual performance W Neil Charman 69 Chapter 6 Basic pharmacology relevant to the action of drugs on the eye Michael J Doughty 77 Chapter 7 Diagnostic drugs Carly S Y Lam 89 Chapter 8 Therapeutic drugs Graham Hopkins 101 Chapter 9 The optometric management of ocular adverse reactions to systemic medication Bernard Gilmartin 111 Chapter 10 Ocular disease Christopher Bentley and Ranjit Sandhu 127 Chapter 11 The development of refractive error Nicola Logan 159 PART 2 Techniques Chapter 12 Visual acuity and contrast sensitivity Marc Lay, Elizabeth Wickware and Mark Rosenfield 173 Chapter 13 Objective refraction David A Atchison 187 Chapter 14 Subjective refraction Mark Rosenfield 209 Chapter 15 Clinical assessment of accommodation Mark Rosenfield 229 http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management v Contents 241 Chapter 17 Examination of the anterior segment of the eye Keith Edwards, Jerome Sherman, Joan K Portello and Mark Rosenfield 257 Chapter 18 Examination of the posterior segment of the eye Sherry J Bass 277 Chapter 19 Ocular biometry, colour vision testing and electrophysiology Leon N Davies 301 Chapter 20 Visual field examination John G Flanagan 319 Chapter 21 Contact lenses Lyndon Jones and Kathryn Dumbleton 335 Chapter 22 Prescribing spectacles Glyn Walsh 357 PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N Chapter 23 Alternative vision correction Shehzad A Naroo AL Chapter 16 Binocular vision assessment Bruce J W Evans Chapter 24 Intraocular pressure and pachymetry Shabbir Mohamed and Sunil Shah 377 391 PART 3 Management SECTION A General Management Chapter 25 Objectives of the eye and vision examination Kent M Daum 407 Chapter 26 Communication skills in optometry – case history and case disposition Catherine Pace Watson 419 Chapter 27 Legal aspects of optometry in the United Kingdom Susan Blakeney 431 SECTION B Management of Special Populations Chapter 28 Paediatric assessment Susan J Leat 439 Chapter 29 Eye protection Christine Purslow and Rachel North 461 Chapter 30 Low vision Jan Lovie Kitchin 475 Chapter 31 Ageing populations Bruce P Rosenthal 499 Chapter 32 Optometric assessment and management of patients with developmental disability Kathryn J Saunders 513 Index vi 531 http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management Foreword AL the eye and vision using electronic and computer tech nology (e.g. short wave perimetry, optical coherence tomog raphy), better understanding of the optics of the eye (e.g. wavefront refraction) and knowledge of the complex neurology of the visual system have all contributed to contemporary optometric examination and management techniques. Optometry: Science, Techniques and Clinical Management expertly reflects the present wide breadth of the scope and practice of optometry including eye and vision care for adults, children and the elderly, low vision, eye protection, contact lenses, as well as communication skills with patients. Each chapter represents an enlightened synthesis of the various aspects of modern optometry, although not in the detailed fashion of a textbook devoted to a given aspect (e.g. binocular vision, ophthalmic drugs). The chapters are written with up to date, evidenced based information of the various examination procedures and management. There are some variations of style as one might expect in a multi authored book, but it is to the credit of the editors that the overall presentation and flow of the text has attained uniformity without significant redundancy. Within the book, one will find the scientific foundation and basic clinical knowledge needed to understand and apply to the practice of optometry. The scope and quality of this book admirably reflects the maturity of optometry, a profession which has become utterly professional, inde pendent and socially responsible. The editors, Drs Mark Rosenfield and Nicola Logan are both well known optometric scientists. They have gathered a group of eminent co authors from various countries, each an expert in their own field. It is an enormous and arduous task to edit a book written by so many authors, as one becomes involved in a string of administrative tasks to gather the manuscripts. The whole process always proceeds at the speed of the slowest, who sometimes holds up the book for long periods of time. But they have succeeded brilliantly. PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N Optometry can trace its origins back to 1611 when Johannes Kepler wrote his Dioptrice concerning the mathematics of lenses, prisms and mirrors, as well as describing how the image is formed in the eye. In 1623, Daza de Valdes pub lished the first treatise on the use and fitting of spectacles. Over the next centuries, optical instruments including tele scopes and special lenses (e.g. achromatic lenses) appeared. By the end of the 19th century, opticians were performing ocular refractions based on prior scientific discoveries in optics and particularly the explanations of the refractive errors by Donders in 1864 in his classic textbook: ‘Anomalies of Refraction and Accommodation of the Eye’. By this time, Thomas Young had discovered astigmatism (in 1801) and described a famous experiment which demonstrated the role of the crystalline lens in accommodation. Other landmark contributions included the law of refraction (Snell, 1621), the sphero cylindrical lens (Airy, 1825), optotypes (Snellen, 1862), and optical instruments to examine the eye, such as the ophthalmoscope (Helmholtz. 1851), ophthalmometer (Ramsden, 1795) and the first subjective instrument to mea sure accommodation (Porterfield, 1759) which was improved subsequently by Badal (1876). The dioptre, which became the standard optical unit, was first introduced by Monoyer in 1875. The distinguished heritage of optometry comes from these classical optical and physical concepts, and many uni versity departments or schools of optometry, such as those in Berkeley, Cardiff, London, Manchester and Sydney origi nated as a division of their respective physics departments. The emphasis of the optometry course was in the physical sciences and that is partly the reason why in the UK the appellation ‘ophthalmic optics’ was used until relatively recently. Today, the emphasis of the curriculum has shifted toward the biological sciences as optometry has become involved in health care delivery as a primary care profession. Many optometrists now participate in the treatment and management of ocular disease including diabetes and glau coma. These developments have been facilitated by legisla tion in several countries including Australia, USA and the UK allowing optometrists to use diagnostic and therapeutic drugs for the management of abnormal ocular conditions. Other recent developments including the introduction of contact lens materials which are more compatible with the eye (e.g. silicone hydrogels), procedures to examine both Michel Millodot, OD, FCOptom, PhD, DOSc (Hon), FAAO Honorary Professor, School of Optometry and Vision Sciences, Cardiff University, UK; Professor Emeritus, The Hong Kong Polytechnic University, Hong Kong http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management vii Preface The book is divided into three sections, namely science, techniques and clinical management. The first section reviews the anatomy, physiology and psychology of vision, examines visual performance and development and dis cusses ocular disease and the pharmacological interventions available to treat abnormal ocular conditions. In the second section, techniques for assessing the status and function of the eye are described together with the correction of refrac tive error using spectacles and contact lenses or by alterna tive means such as temporary or permanent anatomical changes. The final section discusses patient management, communication and legal aspects of optometry, and reviews the needs of special populations such as children, the elderly, low vision and special needs groups. To reflect the international spectrum of optometry, we have included contributions from 40 authors based on four different continents. Currently, the breadth and type of prac tice varies markedly from one country to another, and we have tried to select internationally renowned authors who can provide a flavour of the way they practise in their partic ular location, even if some of the procedures or techniques may be more relevant to one particular region of the world than another. With the development of readily accessible and instantaneous global communication, geographic boundaries may become increasing irrelevant, and it is likely that optometry, like many other professions and political entities, will become more equitable in scope of practice. It is to be hoped that this volume can make a contribution to the ‘globalisation’ of our profession so that high quality primary eye care can be provided to everyone around the world. Finally, we thank the contributors to this volume. It has been a pleasure to work with such an outstanding group of people, and we apologize for all the nagging e mails that production of a work such as this necessitates. Their willing ness to pass on their expertise to both present and future practitioners is a tribute to their generosity and wisdom, and bodes well for the future of this expanding profession. PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N AL This book is the successor to Optometry, edited by Keith Edwards and Richard Llewellyn, which was published in 1988. In the preface to that work, the editors wrote that ‘no single volume fulfilled the perceived need or covered the theoretical background to the visual and perceptive pro cesses together with the techniques for the practical investi gation and subsequent management of the normal and abnormal’. While the goal of this new work remains to meet that need, some 20 years later the scope and practice of optometry has changed dramatically. New techniques and procedures have been incorporated into everyday patient care, some of which were not even invented at the time the last edition was written. Now the practitioner can access sophisticated techniques for imaging the eye using proce dures such as optical coherence tomography, test visual per formance with function specific perimeters, administer modern therapeutic pharmaceutical agents for a wide range of ophthalmic conditions and prescribe contact lenses man ufactured using materials that seek to maintain the natural physiology of the cornea. In addition to these dramatic tech nological advancements, the patient base is also changing. As life expectancy rises, the number of patients over 70 years of age has increased significantly, with a concurrent expan sion in the need for eye care services in this age group. At the same time, the younger members of the population are also in need of both routine and advanced care. Optometry has a responsibility to provide high quality primary eye care to all members of society. With the rapidly expanding scope of practice of optome try, one might ask how a single volume can cover all aspects of this growing profession. The simple answer is it cannot, particularly since many of the topics covered by a single chapter in this volume have entire textbooks devoted to them, such as contact lenses, visual fields or binocular vision. Nevertheless, the goal of this book is to provide the reader with an introduction to each area. Hopefully, this will whet the appetite and motivate them to move on to more advanced sources of information, such as specialist texts and journal articles. However, it is hoped that this integrated approach will appeal to both students new to the field of optometry and established practitioners seeking to update their knowledge. Mark Rosenfield Nicola Logan http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management ix Contributors David A Atchison MSc (Optom), PhD, DSc, FAAO, FOSA, CertEd (Higher Ed) Graham Hopkins BPharm, PhD, MRPharmS Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia Lyndon Jones FCOptom, PhD, DipCLP, DipOrth, FAAO (DipCL) Gary E Baker PhD Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Canada Sherry J Bass OD, MS, FAAO School of Optometry, The Hong Kong Polytechnic University, Hong Kong PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N SUNY College of Optometry, New York, USA Carly S Y Lam MCOptom, PhD, FAAO AL Department of Optometry and Visual Science, City University, London, UK Community Pharmacist, Cheltenham, UK Christopher Bentley MCOptom, FRCOphth Central Middlesex Hospital, London, UK Susan Blakeney FCOptom, PhD, LLM, LLB The College of Optometrists, London, UK W Neil Charman FCOptom (Hon), PhD, DSc, FOptSocAm Department of Optometry and Neuroscience, University of Manchester, Manchester, UK Kent M Daum OD, PhD Marc Lay BS SUNY College of Optometry, New York, USA Susan J Leat FCOptom, PhD, FAAO School of Optometry, University of Waterloo, Waterloo, Canada Nicola Logan MCOptom, PhD School of Life and Health Sciences, Aston University, Birmingham, UK Jan Lovie-Kitchin MSc (Optom), PhD, FAAO Illinois College of Optometry, Chicago, USA School of Optometry, Queensland University of Technology, Brisbane, Australia Leon N Davies MCOptom, PhD, FAAO, FHEA Shabbir Mohamed MBChB (Hons), MRCOphth, FRCSEd School of Life and Health Sciences, Aston University, Birmingham, UK University Hospital Birmingham, NHS Foundation Trust, Birmingham, UK Michael J Doughty PhD Shehzad A Naroo MCOptom, PhD, FIACLE, FAAO, FBCLA Department of Vision Sciences, Glasgow Caledonian University, Glasgow, UK School of Life and Health Sciences, Aston University, Birmingham, UK Kathryn Dumbleton MCOptom, MSc, FAAO (DipCL), FBCLA Rachel North FCOptom, PhD Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Canada School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK Keith Edwards FCOptom, DipCLP, FAAO Catherine Pace Watson OD Bausch & Lomb, New York, USA SUNY College of Optometry, New York, USA Bruce J W Evans FCOptom, PhD, DipCLP, DipOrth, FAAO, FBCLA Joan K Portello OD, MPH, MS, FAAO Institute of Optometry, London, UK; Optometry and Visual Science, City University, London, UK Christine Purslow MCOptom, PhD, FBCLA, FIACLE John G Flanagan MCOptom, PhD, FAAO School of Optometry, University of Waterloo, Waterloo, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Canada SUNY College of Optometry, New York, USA School of Optometry and Vision Sciences, Cardiff University, Cardiff, UK Mark Rosenfield MCOptom, PhD, FAAO SUNY College of Optometry, New York, USA James M Gilchrist FCOptom, PhD Bruce P Rosenthal OD, FAAO Bradford School of Optometry and Vision Science, University of Bradford, Bradford, UK Low Vision Programs, Lighthouse International; SUNY College of Optometry, New York, USA; Low Vision Service, Mt Sinai Hospital, New York, USA Bernard Gilmartin FCOptom, PhD, FAAO School of Life and Health Sciences, Aston University, Birmingham, UK Ranjit Sandhu MRCOphth Central Middlesex Hospital, London, UK http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management xi Contributors Kathryn J Saunders MCOptom, PhD Glyn Walsh FCOptom, PhD School of Biomedical Sciences, University of Ulster, Coleraine, UK Department of Vision Sciences, Glasgow Caledonian University, Glasgow, UK Sunil Shah MBBS, FRCOphth, FRCS (Ed), FBCLA Midland Eye Institute, Solihull, UK; School of Life and Health Sciences, Aston University, Birmingham, UK; School of Biomedical Sciences, University of Ulster, Coleraine, UK Carol Westall PhD Jerome Sherman OD, FAAO Elizabeth Wickware BS SUNY College of Optometry, New York, USA SUNY College of Optometry, New York, USA PR SA O M PE PL R E TY C O O F N E TE L N SE T V - N IE O R T FI N AL Ophthalmology and Vision Science, University of Toronto and The Hospital for Sick Children, Toronto, Canada xii http://www.us.elsevierhealth.com/Health-Professions/Optometry/book/9780750687782/Optometry-Science-Techniques-and-Clinical-Management