Page 7 - PowerPoint 演示文稿
P. 7
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