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Preface






               As we travel across the world, we see that numerous countries are still
               missing out on developments. We are fortunate to have almost all the latest
               developments in the field of ophthalmic lenses. The availability of wide
               range in the material and design of ophthalmic lenses has made it
               indispensable to understand the principles of optics behind them to
               understand their use and practical application. In developed countries, the
               newer developments in the lens design and material are immediately
               accepted irrespective of their cost and necessity. This kind of “ready to
               accept new development” approach is generally not seen in the countries
               which are on the brink of developments. In those places, the availability of
               wide range of products creates a typical situation for low income group
               who look for best at most economical cost. They need to be understood
               that technological developments are meant to cater to the increasing
               complexities of life and ever changing lifestyle. And products developed
               after extensive research and studies also carry the cost of research involved
               in it. This necessitates the need for detailed information about their
               technology and application.
                  Lots of new ophthalmic lenses have been introduced, but unfortunately
               there is a dearth of good books on this subject. This book is an effort to fill
               this gap. The need for a book that describes the choice of ophthalmic lenses
               has been already seen by the kind of acceptance given to author’s first
               book Optician’s Guide. But the information presented in this book is
               designed to provide comprehensive details about the ophthalmic lenses
               and their dispensing tips. Most of the information will replicate my 22
               years of experience in the field of optical dispensing and will be helpful to
               the students of optometry. In addition, this book may also be of great help
               to ophthalmologists, opticians, ophthalmic lens manufacturers and all those
               who would like to excel in the field of optical dispensing.
                  Finally, it is hoped that the readers of this book will enjoy its simplicity
               and appreciate its organized presentation.

                                                             Ajay Kumar Bhootra
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