After an attack on earth, all reflective surfaces become weapons to release monsters, causing a planet-wide ban on mirrors. Despite the danger, the demand rises, and 17-year-old Marty Callahan becomes a distributor in an illegal mirror trade—until he’s caught by the mayor's son, whose slate is far from clean. Both of them are exiled for their crimes to one of the many abandoned cities overrun by fog. But they soon realize their thoughts influence their surroundings and their deepest fears begin to manifest. With fast pacing and riveting characters, this is a book that you’ll finish in one sitting.

Now updated and expanded to cover the latest technologies, this full-color text on clinical refraction uses an easy-to-read format to give optometry students and practitioners all the important information they need. Also covers a wide range of other aspects of the eye exam, including anterior and posterior segment evaluations, contact lens, ocular pharmacology, and visual field analysis. Four new chapters cover wavefront-guided refraction, optical correction with refractive surgeries, prosthetic devices, and patients with ocular pathology. - Offer precise, step-by-step how-to's for performing all of the most effective refractive techniques. - Presents individualized refractive approaches for the full range of patients, including special patient populations. - Contriubtors are internationally recognized, leading authorities in the field. - New full-color design with full-color images throughout. - Completely updated and expanded to include current technologies. - A new chapter on Optical Correction with Refractive Surgeries, including keratoplasty, traditional refractive surgeries (e.g. LASIK and PRK), crystalline lens extraction with and without pseudophakia, the new presbyopic surgery, etc. - A new chapter on Wavefront Guided Refraction provides information on the advantages and limitations the Hartmann-Shack Method for objective refraction plus aberrometry and the refraction and the use of in the correction of the eye with spectacles, contact lenses, and refractive surgery. - A new chapter on Patients with Ocular Pathology reflects the most current knowledge of patients with ocular pathologies. - Provides information on Optical Correction with Prosthetic Devices, including corneal onlays, stromal implants, phakic intraocular lenses, etc. - Includes new chapters and/or discussions on such topics as: Aberrations of the Eye, Refractive Consequences of Eye Pathology, Diagnosis and Treatment of Dry Eye, Diagnosis of Pathology of the Anterior Segment, Diagnosis of Glaucoma, and Diagnosis of Pathology of the Posterior Segment. - Visual Acuity chapter expanded to include the effect of refractive error on visual acuity and statistics on how much of a change in visual acuity is significant. - Objective Refraction, Corneal Topography, and Visual Field Analysis chapters include the addition of new electro-optical and computer techniques and equipment. - Chapters on Multifocal Spectacle Lenses and Contact Lenses now cover newer progressive addition lenses and contact lenses that are now on the market. - Electrodiagnosis chapter revised to take a more clinical approach.

Retinoscopy is an eye exam that determines the refractive error of the eye (long sighted, short sighted, astigmatism). A refraction test indicates the strength of the prescription needed for glasses or contact lenses. The new edition of this book provides a concise overview of clinical refraction. Presented in an easy to read format, it is divided into two main sections. The first part explains basic clinical procedures for routine refraction, beginning with an introduction to instruments and the procedure, followed by aspects of the test for different disorders including myopia (short sightedness), astigmatism, keratoconus and refraction in children. Section two provides in depth discussion on retinoscopy and correct use of the retinoscope. The second edition has been fully revised and updated to explain the latest advances in the field, and is further enhanced by clinical images and figures. Key points Practical guide to clinical refraction and retinoscopy Fully revised and updated second edition Explains basic procedures and instruments for refraction test and refraction in different ophthalmic disorders Previous edition (9789351520634) published in 2014

Embark on a profound journey through the depths of human emotion and spirituality in the updated anniversary edition of Refractions by renowned artist Makoto Fujimura. This timeless collection of reflective essays invites you to explore themes of grief, loss, tragedy, and disruption through the eyes of an artist's soul. Originally conceived in the shadow of the fallen twin towers of the World Trade Center, near where Fujimura's New York art studio stood, this anniversary edition includes new essays unpacking the author's further insights into his concepts of culture care and a theology of making. Refractions carries the weight of history and the urgency of the moment, illuminating beauty, healing, and hope. A gift for any artist or supporter of the arts, Refractions connects faith, art, and life, offering insight into healing with the wisdom and perspective of a leading contemporary artist and follower of Jesus, making beauty from ashes, and the gospel as a message as breathtaking and intricate as the lives it touches. In a world marred by violence and despair, Fujimura guides you toward a deep understanding of life's intricate tapestry, where beauty emerges from unexpected places, and healing finds its roots in the goodness of God and human resilience.

It provides a comprehensive and clinically based guide to visual optics. With its suggested routines and numerous examples, this new book offers a straightforward "how to approach" to the understanding of clinical optics, refraction and contact lens optics. Designed for easy access, it presents information in a concise format that highlights key, need-to-know points. Part 1 addresses the basic visual optics of the eye along with emmetropia, ametropia and the correction of ametropia with spectacle lenses. Part 2 turns to the optics of contact lenses and the use of contact lenses in vision correction. Numerous worked examples based on real examination questions Practical and user friendly text Over 190 clear line diagrams An essential passport to examination success and a valuable quick reference for practitioners

How many times does it take to destroy the world before you can save it?In 1986, physicist Timothy Straus hears voices that teach him how to create a space-warping engine that will change the world. In 2098, a fighter pilot hears voices that help him fight an authoritarian corporatist regime in the ashes of nuclear fallout. In 2155, the only self-aware robot on Mars struggles to steer humanity away from a demagogue who speaks from the shadows. Told through kaleidoscope storytelling across space and time, these three people are connected in ways they could never imagine. As they pull on the strings of the multiverse, what they can't see is that every villain begins as a savior-every enemy starts as a friend. With the power to refract reality, will they learn that one person can't save the people? That only the people can save the people?

Learn about the revolutionary new technology of negative-refractionmetamaterials Negative-Refraction Metamaterials: Fundamental Principles andApplications introduces artificial materials that support theunusual electromagnetic property of negative refraction. Readerswill discover several classes of negative-refraction materialsalong with their exciting, groundbreaking applications, such aslenses and antennas, imaging with super-resolution, microwavedevices, dispersion-compensating interconnects, radar, anddefense. The book begins with a chapter describing the fundamentals ofisotropic metamaterials in which a negative index of refraction isdefined. In the following chapters, the text builds on thefundamentals by describing a range of useful microwave devices andantennas. Next, a broad spectrum of exciting new research andemerging applications is examined, including: * Theory and experiments behind a super-resolving,negative-refractive-index transmission-line lens * 3-D transmission-line metamaterials with a negative refractiveindex * Numerical simulation studies of negative refraction of Gaussianbeams and associated focusing phenomena * Unique advantages and theory of shaped lenses made ofnegative-refractive-index metamaterials * A new type of transmission-line metamaterial that is anisotropicand supports the formation of sharp steerable beams (resonancecones) * Implementations of negative-refraction metamaterials at opticalfrequencies * Unusual propagation phenomena in metallic waveguides partiallyfilled with negative-refractive-index metamaterials * Metamaterials in which the refractive index and the underlyinggroup velocity are both negative This work brings together the best minds in this cutting-edgefield. It is fascinating reading for scientists, engineers, andgraduate-level students in physics, chemistry, materials science,photonics, and electrical engineering.

With very few exceptions, geodetic measurements use electro magnetic radiation in order to measure directions, distances, time delays, and Doppler frequency shifts, to name the main ter restrial and space observables. Depending on the wavelength of the radiation and the purpose of the measurements, the follow ing parameters of the electromagnetic wave are measured: ampli tude, phase, angle-of-arrival, polarisation and frequency. Ac curate corrections have to be applied to the measurements in order to take into account the effects of the intervening medium between transmitter and receiver. The known solutions use at mospheric models, special observation programs, remote sensing techniques and instrumental methods. It has been shown that the effects of the earth's atmospheric envelope present a fundamental limitation to the accuracy and precision of geodetic measurements. This applies equally to ter restrial and space applications. Instrumental accuracies are al ready below the atmospherically induced limitations, and thus the accuracy demands on the geodetic refraction solutions are entering a new magnitude zone. This monograph is primarily devoted to the properties of the at mospheric effects on various geodetic measurements and to their evaluation. Ten review papers cover the most pressing aspects of the atmospheric effects on geodetic measurement~. Ttiese state of-the art papers were written by eminent specialists in their respective research fields.

The IOL technical specifications, the clinical data, and the necessary clinical and surgical skills comprise the scientific foundation for achieving a "premium" refractive outcome. To consistently achieve patient satisfaction, however, requires mastering the art of patient and IOL selection, communicating and counseling effectively, and providing a "premium" patient experience. This is a nontraditional book in which multiple experts are separately asked to discuss controversial subjects in a reader-friendly format. There is balanced coverage of all of the available refractive IOLs, as well as those that may become available in the near future. A major emphasis is placed on avoiding and managing complications or potentially dissatisfied patients. There are more than 200 chapters that are organized into 14 major sections, over 300 images, 100 tables, and 12 sidebars that cover every aspect of refractive IOL clinical practice. This is a comprehensive educational resource addressing the most demanding and rapidly evolving area in cataract and refractive surgery today and the first book to cover both the clinical and nonclinical aspects of offering refractive IOL services.

This volume is a compilation of the newer techniques of refraction seismic surveying. It contains a series of articles written principally by members of SEG who are specialist in refraction techniques. The volume contains only new materials with a bibliography of references to other refraction materials available. The majority of the papers are of a "technique type" which describe some particular interpretation technique that may be used for better interpretation of special refraction data.