Refraction
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| Author | : Naomi Hughes |
| Publisher | : Page Street YA |
| Total Pages | : 263 |
| Release | : 2019-11-05 |
| Genre | : Young Adult Fiction |
| ISBN | : 1624148913 |
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.
| Author | : William J. Benjamin |
| Publisher | : Elsevier Health Sciences |
| Total Pages | : 2711 |
| Release | : 2006-10-13 |
| Genre | : Medical |
| ISBN | : 0702038970 |
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.
| Author | : Ajay Kumar Bhootra |
| Publisher | : Jaypee Brothers Medical Publishers |
| Total Pages | : 146 |
| Release | : 2019-06-30 |
| Genre | : Medical |
| ISBN | : 9352708628 |
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
| Author | : Andrew William Keirl |
| Publisher | : Elsevier Health Sciences |
| Total Pages | : 354 |
| Release | : 2007-10-10 |
| Genre | : Medical |
| ISBN | : 0750688890 |
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
| Author | : Makoto Fujimura |
| Publisher | : NavPress |
| Total Pages | : 225 |
| Release | : 2024-08-06 |
| Genre | : Religion |
| ISBN | : 1641587113 |
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.
| Author | : David F. Chang |
| Publisher | : SLACK Incorporated |
| Total Pages | : 964 |
| Release | : 2008 |
| Genre | : Intraocular lenses |
| ISBN | : 9781556428593 |
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.
| Author | : David G. Hunter |
| Publisher | : CRC Press |
| Total Pages | : 141 |
| Release | : 2024-06-01 |
| Genre | : Medical |
| ISBN | : 1040140424 |
The popular optics review manual, Last-Minute Optics: A Concise Review of Optics, Refraction, and Contact Lenses, has been revised and updated into a Second Edition. This unique resource boils down the overwhelming subject matter of clinical optics and refraction, helping the ophthalmologist cover the essentials in a single review manual. The content is based upon the practical experience of two clinically active experts who lecture on ophthalmic optics around the world. This updated Second Edition by Drs. David G. Hunter and Constance E. West includes new questions added to selected chapters and a new chapter covering refractive surgery, as well as a key chapter that helps you evaluate patients with symptoms related directly to optical or refractive concerns. The complex concepts of optics are revealed in easy-to-understand explanations enhanced by simple illustrations. Last-Minute Optics, Second Edition allows you to test your knowledge while increasing your understanding of optics. Designed in a clear, concise, question-and-answer format, this book allows for self-assessment and a chance to test your understanding before you read the answer. Features of the Second Edition: • Written in a light and approachable style to make optics accessible and understandable • Unique question-and-answer format allows for self-assessment while studying to identify areas where more work is needed • Perfect for limited study time • Includes real-life examples that are clinically relevant • Numerous practical tips to help enhance clinical practice • Includes 223 questions and answers Whether you’re an ophthalmologist, ophthalmic technician, resident or student, reviewing the optics facts and concepts is easier with Last-Minute Optics: A Concise Review of Optics, Refraction, and Contact Lenses, Second Edition.
| Author | : David Abrams |
| Publisher | : |
| Total Pages | : 324 |
| Release | : 1993 |
| Genre | : Medical |
| ISBN | : |
Presents the theory and practice of the correction of defects in the optical system of the eyes and their associated muscles. Includes coverage of contact lenses, methods of objective testing, lens implantation after cataract surgery, and contrast sensitivity testing for visual acuity.
| Author | : Hendrik Antoon Lorentz |
| Publisher | : Rodopi |
| Total Pages | : 208 |
| Release | : 1997 |
| Genre | : Electromagnetic fields |
| ISBN | : 9789042002630 |
1997 - the centennial year of the electron - provides a good occasion to publish the first English translation ever made of H.A. Lorentz's doctoral dissertation of 1875. Just 22 years old, Lorentz took up and handled magisterially one major unresolved problem of Maxwell's electromagnetic theory, the reflection and refraction of light. By then the superiority of Maxwell's electromagnetic ether theory over current elastic solid conceptions such as Fresnel's was not nearly a settled issue. In his dissertation, Lorentz strove with considerable success to make it that. Still, he found that neither theory allowed for a satisfactory account of dispersion. One intriguing aspect of Lorentz's earliest scientific achievement (which within two years was to earn him the chair of theoretical physics at Leyden University) is that a range of subjects soon to occupy him for the rest of his life are already clearly foreshadowed in it. So far, Lorentz's first step in science has existed only in the original Dutch, and in a French translation made long ago as part of the Collected Works. Here, the joint translators have striven to provide a fluently readable, full text while preserving the flavor of Lorentz' original language and style.
| Author | : Society of Exploration Geophysicists |
| Publisher | : |
| Total Pages | : 628 |
| Release | : 1967 |
| Genre | : Science |
| ISBN | : |
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.
