manual of optics and refraction

191 Pages·10.162 MB·English

by  Mukherjee

Manual of
Optics and Refraction

Manual of
Optics and Refraction
Second Edition
PK Mukherjee ms (Ophth)
Retired Professor and Head
Department of Ophthalmology
Pt Jawahar Lal Nehru Memorial Medical College
Raipur, Chhattisgarh, India
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Manual of Optics and Refraction
First Edition: 2015
Second Edition: 2022
ISBN 978-93-90020-65-2
Preface
Errors of refraction are the most common ocular disorders for which people seek ophthalmic consultancy. The number of
such persons is so high that WHO has put errors of refraction among the top six causes of blindness.
Errors of refraction cannot be cured, but only given palliation by a method as simple and cheap as spectacles or as complex
and costly as refractive surgery. The latter is beyond the scope of this book. It has been given only a passing reference. The
book mostly deals with spectacles, contact lenses and a lesser degree low vision aids. Contact lenses and low vision aids by
their own merits are subspecialties for which to study them in detail larger books on specific subjects may be consulted.
The aim of prescribing spectacles is not only improving vision but also to give a useful and comfortable vision. The
refractive errors and their management cannot be dealt without the knowledge of light, optics of various optical devices, and
both physical optics and its pathological counterpart.
The present book is a compendium of physical properties of light, its modification as laser and fiberoptic devices, various
types of optical devices, their optics, errors of refraction—their clinical presentation and management. The details of surgical
procedures have been avoided. The book is illustrated with lots of colored and black/white diagrams, flowcharts and tables.
Appropriate photographs have also been provided wherever required.
There are many books available on the subject of errors of refraction. Some of these books are too large and cumbersome
for undergraduates to comprehend. The postgraduates also sometimes try to avoid these due to sheer volume.
The students would prefer a handy book for ready-reference. The present book has been written not to do away with the
classics, but to be used as a backup supplement. The book is written in simple language mostly for postgraduates, trainees
and practicing optometrists, and medical teachers. The undergraduates will also find it useful.
PK Mukherjee

Acknowledgments
I express my heartfelt gratitude to Dr SL Adile, Former Director, Medical Education, Government of Chhattisgarh, India;
Dr AK Chandrakar, Vice-chancellor, Pt. Deendayal Upadhyay Memorial Health Sciences and Ayush University of
Chhattisgarh; Dr ML Garg, Dean, Government Medical College, Kanker; Dr Nidhi Pandey, Director, Regional Institute of
Ophthalmology Medical College, Raipur; and Dr Santosh Patel, Professor of Ophthalmology, Pt Jawahar Lal Nehru Memorial
Medical College, for their unending help in writing the book.
I am indebted to Dr Lalit Verma, General Secretary, All India Ophthalmological Society (AIOS), for his permission to use
photographs and diagrams from the continuing medical education (CME) books and the booklets published from time to
time. I am thankful to Dr MD Singh for permitting to use figures from his article on Applanation Tonometers.
Shri Sravana, Local Representative of Appasamy Associates for his help to get approval of the firm to use the photographs
from their books. I extend my thanks to Arvind Kasthuri and RK Narayanaswami, Executive Directors, Operations, Appasamy
Associates, Chennai, Tamil Nadu, India for permission to use the materials published in their books.
I wish to thank Shri Jitendar P Vij (Group Chairman), M/s Jaypee Brothers Medical Publishers (P) Ltd, New Delhi,
India, for his suggestion, which motivated me to write the first edition of this book and permitted me to use diagrams and
figures published by Jaypee Brothers, in the books namely Principles and Practice of Refraction and Optics by NC Singhal.
I am immensely thankful to Ms Nikita Chauhan (Senior Development Editor), Jaypee Brothers Medical Publishers. I am
especially indebted to Ms Chauhan for her continued efforts to get this edition corrected in the present form she deserves
special mention for her effort.
I am much thankful to Sri Anil Kumar Prasad my computer assistant who had immense patience in typing, retyping,
correcting the manuscript and drawing the pictures and make the charts and tables. Without his efforts this book would have
not been possible.
I am thankful to all the persons who have permitted me to use their clinical pictures in the book.