The Third Lens


Book Description

Advancing new sense-making tools for organizational strategy, this book demonstrates how to deal with asymmetric threats and opportunities. It employs participatory methods and multiple sector strategies to shift strategic thinking into considering disorder complexity and chaos. The contributors examine whether the 'third lens' or ontology of a project (its nature, work and strategic landscape) should influence the two other 'lenses' (our epistemological and methodological choices) that create an understanding of the world we live in. The book also considers the importance of time, in particular spatio-temporal relations that serve as reflection points for sense-making and strategic decision-making, both with respect to the situation in which they take place and as conceptual vehicles for managing multiple times and realities. Written for 21st century strategists, this volume will benefit people and organizations who struggle daily with multiple co-existing ontological, epistemological and methodological discourses.




The Third Lens


Book Description

Does science aim at providing an account of the world that is literally true or objectively true? Understanding the difference requires paying close attention to metaphor and its role in science. In The Third Lens, Andrew S. Reynolds argues that metaphors, like microscopes and other instruments, are a vital tool in the construction of scientific knowledge and explanations of how the world works. More than just rhetorical devices for conveying difficult ideas, metaphors provide the conceptual means with which scientists interpret and intervene in the world. Reynolds here investigates the role of metaphors in the creation of scientific concepts, theories, and explanations, using cell theory as his primary case study. He explores the history of key metaphors that have informed the field and the experimental, philosophical, and social circumstances under which they have emerged, risen in popularity, and in some cases faded from view. How we think of cells—as chambers, organisms, or even machines—makes a difference to scientific practice. Consequently, an accurate picture of how scientific knowledge is made requires us to understand how the metaphors scientists use—and the social values that often surreptitiously accompany them—influence our understanding of the world, and, ultimately, of ourselves. The influence of metaphor isn’t limited to how we think about cells or proteins: in some cases they can even lead to real material change in the very nature of the thing in question, as scientists use technology to alter the reality to fit the metaphor. Drawing out the implications of science’s reliance upon metaphor, The Third Lens will be of interest to anyone working in the areas of history and philosophy of science, science studies, cell and molecular biology, science education and communication, and metaphor in general.




The Third Lens


Book Description

Advancing new sense-making tools for organizational strategy, this book demonstrates how to deal with asymmetric threats and opportunities. Written for 21st century strategists, it will benefit people and organizations who struggle daily with multiple co-existing ontological, epistemological and methodological discourses.




Contact Lens Practice E-Book


Book Description

In this thoroughly revised and updated third edition of Contact Lens Practice, award-winning author, researcher and lecturer, Professor Nathan Efron, provides a comprehensive, evidence-based overview of the scientific foundation and clinical applications of contact lens fitting. The text has been refreshed by the inclusion of ten new authors – a mixture of scientists and clinicians, all of whom are at the cutting edge of their specialty. The chapters are highly illustrated in full colour and subject matter is presented in a clear and logical format to allow the reader to quickly hone in the desired information. - Ideal for an optometrist, ophthalmologist, orthoptist, optician, student, or work in the industry, this book will serve as an essential companion and guide to current thinking and practice in the contact lens field. - Highlights of this edition include a new chapter on myopia control contact lenses, as well are completely rewritten chapters, by new authors, on keratoconus, orthokeratology, soft and rigid lens measurement and history taking.







Development of the Ocular Lens


Book Description

Publisher Description




Lens Design Fundamentals


Book Description

A large part of this book is devoted to a study of possible design procedures for various types of lens or mirror systems, with fully worked examples of each. The reader is urged to follow the logic of these examples and be sure that he understands what is happening, noticing particularly how each available degree of freedom is used to control one aberration. Not every type of lens has been considered, of course, but the design techniques illustrated here can readily be applied to the design of other more complex systems. It is assumed that the reader has access to a small computer to help with the ray tracing, otherwise he may find the computations so time-consuming that he is liable to lose track of what he is trying to accomplish.




Lenses on Reading, Second Edition


Book Description

This widely adopted text explores key theories and models that frame reading instruction and research. Readers learn why theory matters in designing and implementing high-quality instruction and research; how to critically evaluate the assumptions and beliefs that guide their own work; and what can be gained by looking at reading through multiple theoretical lenses. For each theoretical model, classroom applications are brought to life with engaging vignettes and teacher reflections. Research applications are discussed and illustrated with descriptions of exemplary studies. New to This Edition *Current developments in theory, research, and instructional practices. *Useful pedagogical features in every chapter: framing questions, discussion ideas, and learning activities. *Classroom applications give increased attention to English language learners and technology integration. *Coverage of additional theories (Third Space Theory) and theorists (Bakhtin and Bourdieu).




Lens Design


Book Description

A Practical Guide to Lens Design focuses on the very detailed practical process of lens design. Every step from setup specifications to finalizing the design for production is discussed in a straight forward, tangible way. Design examples of several widely used modern lenses are provided. Optics basics are introduced and basic functions of Zemax are described. Zemax will be used throughout the book.




Lens Design, Third Edition,


Book Description

Featuring over 700 references, equations, tables, and drawings, this highly lauded and best-selling reference emphasizes practical designs of over 30 lens systems, including single-element, two-element achromats, air-spaced triplets, projection lenses, and sophisticated wide-angle and zoom lenses. It comes with software that supplies starting solutions for computer optimization programs lens prescriptions and several shorter programs to compute the refractive index of glasses from a variety of manufacturers, create lens drawings, perform zoom computations, do test glass fitting, and calculate third-order solutions for single lenses, achromats, and triplets.