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تعداد نتایج: 994

Handbook of Visual Optics, Two-Volume Set

By Pablo Artal
Publisher: CRC Press, 2017-06-27
Pages: 2119
Language: en
ISBN_13:9781351645508
ISBN_10:1351645501
Subject: Medical

Handbook of Visual Optics, Volume Two

Instrumentation and Vision Correction

جزئیات و درخواست

By Pablo Artal
Publisher: CRC Press, 2017-02-24
Pages: 405
Language: en
ISBN_13:9781482237931
ISBN_10:1482237938
Subject: Medical

Handbook of Visual Optics, Volume One

Fundamentals and Eye Optics

جزئیات و درخواست

By Pablo Artal
Publisher: CRC Press, 2017-02-17
Pages: 1313
Language: en
ISBN_13:9781315355726
ISBN_10:1315355728
Subject: Medical

Adaptive Optics for Vision Science

Principles, Practices, Design, and Applications

جزئیات و درخواست

By Jason Porter, Hope Queener, Julianna Lin, Karen Thorn, Abdul A. S. Awwal
Publisher: John Wiley & Sons, 2006-06-12
Pages: 624
Language: en
ISBN_13:9780471914648
ISBN_10:0471914649
Subject: Science

Journal of the Optical Society of America

Optics, image science, and vision. A

جزئیات و درخواست

2006
Pages: 488
Language: en
OTHER:CHI:76699673
Subject: Imaging systems

!Te Toca!

A New Communicative Spanish Course

جزئیات و درخواست

By Mark Allinson
Publisher: Routledge, 2014-02-04
Pages: 294
Language: en
ISBN_13:9781317858928
ISBN_10:1317858921
Subject: Foreign Language Study

Adaptive Optics for Industry and Medicine

Proceedings of the Sixth International Workshop, National Un...

جزئیات و درخواست

By Christopher Dainty
Publisher: World Scientific, 2008
Pages: 519
Language: en
ISBN_13:9781848161108
ISBN_10:1848161107
Subject: Science

$IOL Power by Kenneth J. Hoffer, MD will be the definitive resource worldwide for ophthalmologists who strive to increase the accuracy for all IOL calculations,especially for multifocal IOLs and overcoming the challenges that arise when treating patients that have had laser refractive surgery, such as RK, PRK, LASIK, and LASEK. Inside the pages of IOL Power, Dr. Hoffer is joined by some of the most respected international physicians and physicists in the field of IOL power such as Aramberri, Haigis, Norrby, Olsen and Shammas. Together their expertise, spanning over 35 years, makes even the most difficult subjects easy to understand. This volume will become the definitive reference source on the subject of IOL power calculation. Some topics include: Ultrasound velocities for axial length measurement Optical AL (IOLMaster and Lenstar) in difficult eyes Manual and automatic keratometry and instrumentation Topography & Scheimpflug camera corneal power Value of theoretic formulas Formula personalization Multifocal and toric IOLs Aspheric IOLs Effect of IOL tilt on astigmatism Chapters Cover: All aspects of obtaining the most accurate biometry Available modern calculation formulas Latest instruments Problems that can arise, how to prevent and repair them IOL Power by Kenneth J. Hoffer, MD is structured in a logical manner so as to cover every facet of IOL power from the basics to the most complicated subjects to achieve the most accurate and precise calculations and should be in the hands of all ophthalmic surgeons, technicians, residents and students.$

جزئیات و درخواست

By Kenneth Hoffer
Publisher: CRC Press, 2024-06-01
Pages: 280
Language: en
ISBN_13:9781040141885
ISBN_10:1040141889
Subject: Medical

Corneal Biomechanics

From Theory to Practice

$While lecturing in recent months at a number of prominent institutions, I asked some of the residents and fellows whether and how they might benefit from a book on corneal biomechanics. The typical response was the look of a deer caught in the headlights as they tried to intuit the “appropriate” answer, but had little understanding or insight as to why this would be an important and useful knowledge base for them now, or in the future. I then posed the question differently. “Would a book that explained corneal biomechanical principles and testing devices and their application in detecting eyes at risk for developing keratoconus and post-LASIK ectasia, understanding the biomechanical impact of specific types of keratorefractive surgery and riboflavin UV-A corneal collagen cross-linking, and the impact of corneal biomechanics on the fidelity of intraocular pressure measurement and risk for glaucoma progression be of interest?” Framed in this context, the answer I got was a resounding, “Yes!” Therein lies a fundamental disconnect that highlights both the opportunity and need to educate all ophthalmologists about this nascent field. This comprehensive book is strengthened by the breadth of contributions from leading experts around the world and provides an important resource for ophthalmologists at all levels of training and experience. It gives a panoramic snapshot of our understanding of corneal biomechanics today, bridging the gap between theoretical principles, testing devices that are commercially available and in development as well as current and potential future clinical applications. While there has been a long-held appreciation that all types of keratorefractive surgery have an impact and interdependence on corneal biomechanics and wound healing, the initial finite element analyses that were applied to understand radial keratotomy were limited by incorrect assumptions that the cornea was a linear, elastic, homogenous, isotropic material.1 With the advent of excimer laser vision correction, critical observations indicated that Munnerlyn’s theoretic ablation profiles did not account for either lower or higher order (e.g. spherical aberration) refractive outcomes,2 suggesting that there were important components missing from the equation—e.g., corneal biomechanics and wound healing. In a seminal editorial, Roberts3 pointed out that the cornea is not a piece of plastic, but rather a material with viscoelastic qualities. Since that time, much has been learned about spatial and depth- related patterns of collagen orientation and interweaving, as well as the biomechanical response to different keratorefractive surgeries that sever tension-bearing lamellae, as the cornea responds to and redistributes stress induced by IOP, hydration, eye rubbing, blinking and extraocular muscle forces.3-6 The first reports of post-LASIK ectasia7 highlighted the need to identify a biomechanical signature of early keratoconus as well as corneas at high risk of developing ectasia irrespective of their current topography or tomography. The introduction of two instruments into clinical use—the Ocular Response Analyzer (ORA) and the Corneal Visualization Scheimpflug Technology (Corvis ST)—that allow measurement of various biomechanical metrics further catapulted the field. The availability of these instruments in routine clinical settings allowed the systematic study of the effect of age, collagen disorders, collagen cross-linking, corneal rings, flaps of various depths, contour, sidecut angulation, pockets, and flockets, just to name of few. Future application of biomechanics to the sclera may improve our understanding of the development and prevention of myopia, as well as scleral surgeries and treatments under development for presbyopia. It was appreciated by Goldmann and Schmidt that corneal thickness and curvature would influence the measurement of applanation tonometry. The recent ability to measure some corneal biomechanical metrics have led to IOP measurement that may be more immune both to their influence and the impact of central corneal thickness (CCT). Certain chapters in this book explain how a thin cornea could be stiffer than a thick one and that stiffness is also impacted by IOP, thereby precluding simplistic attempts to adjust IOP measurements using nomograms based upon CCT alone. Also highlighted is how corneal hysteresis, the ability of the cornea to absorb and dissipate energy during the bidirectional applanation response to a linear Gaussian air puff, appears to be an independent risk factor for glaucoma progression and rate of progression.9,10 This comprehensive book starts out with a section devoted to outlining basic biomechanical principles and theories, teaching us the language of what Dupps11 has referred to as “mechanospeak”, thus providing a context and common vocabulary to better comprehend the following chapters. By first defining basic concepts such as stress-strain relationships and creep, this theoretical basis is later applied to explain the pathogenesis of corneal diseases, e.g., explaining how a focal abnormality in corneal biomechanical properties precipitates a cycle of decompensation and localized thinning and steepening, clinically expressed as ectasia progression. These early chapters further detail biomechanical differences between in-vivo and ex-vivo testing, between human and animal corneas and sclera, and between methods of testing. The second section provides a thorough description of two FDA-approved devices to measure corneal biomechanics in the clinic (i.e., the ORA and the Corvis ST), as well as an overview of potential future technologies, including OCT with air puff stimulus, ocular pulse elastography, and Brilloiun microscopy. The third and final section of the book is a thorough treatise on how to interpret the metrics derived from the waveform provided by available clinical devices; their adjunct use in ectasia risk screening; the comparative biomechanical impact of various keratorefractive surgeries and corneal procedures such as PRK, LASIK, SMILE, and corneal collagen cross-linking; the impact of corneal biomechanics on IOP measurement; and potential biomechanical markers of enhanced susceptibility to glaucoma progression. This compendium of our current knowledge of corneal biomechanics, its measurement and application, provides a strong foundation to more fully understand advances in keratorefractive and corneal surgery, diseases, and treatments, all of which are interdependent on and influence inherent corneal biomechanical properties and behavior. Both the robust aspects and limitations of our current understanding are presented, including the challenge of creating accurate and predictive finite element models that incorporate the impact of IOP, corneal thickness, geometry, and scleral properties on corneal biomechanics. This book provides a key allowing clinical ophthalmologists and researchers to grasp the basics and nuances of this exciting field and to shape it as it evolves in the future.$

جزئیات و درخواست

By C.J. Roberts, J. Liu
Publisher: Kugler Publications, 2017-05-15
Pages: 328
Language: en
ISBN_13:9789062998760
ISBN_10:9062998763
Subject: Medical

Photonics, Volume 4

Biomedical Photonics, Spectroscopy, and Microscopy

جزئیات و درخواست

By David L. Andrews
Publisher: John Wiley & Sons, 2015-02-27
Pages: 576
Language: en
ISBN_13:9781119014027
ISBN_10:1119014026
Subject: Technology & Engineering

Journal of Refractive Surgery

$Journal of Refractive Surgery$

جزئیات و درخواست

2009
Pages: 494
Language: en
OTHER:UCLA:L0090612649
Subject: Refractive keratoplasty

Global Champions of Sustainable Development

جزئیات و درخواست

By Patricia Flynn, Milenko Gudić, Tay Keong Tan
Publisher: Routledge, 2019-11-19
Pages: 177
Language: en
ISBN_13:9781351176293
ISBN_10:1351176293
Subject: Business & Economics

A Manual for Manuel

$"A Cuban of our acquaintance describes Cortázar as "the best French writer in Spanish." Not only because he has the candor to set his fiction in Paris, where so many South American writers have found breathing room, but because he has a truly French feel for the miscellaneous, kitchen-sinky, birds-eye texture of dally life. In A Manual for Manuel, you'll meet Andres, Marco, Francine, Lonstein, Lucienne, Patricio, and Susanna: a mixed group of French intellectuals and "Argentines who don't know what they're doing" in Paris. Together they make up "the Screwery," a collective that's more "pataphysical" than strictly revolutionary - involved in projects as diverse as collecting a scrapbook of newspaper clippings for Manuel (Patricio and Susanna's baby son), guerrilla theatre in department stores, counterfeiting and currency smuggling, and, grandest of all, the kidnapping of a bigwig from a multinational corporation in return for the release of captured revolutionaries in Latin America. Cortázar's narrative, as we've come to expect, is totally fractured into digressions, essays, undifferentiated dialogue, philosophical meditation, Finnegan's Wake-ish pun-prose, letters, Telexes, etc. Even the book's big, wonderful action scene (this charming crew's disastrous kidnap attempt) is muffled under all the stylistic swaddling. Cortázar is often at his best here: writing about a large group of friends, making them individual yet coherent - smart people being confused together. But the book suffers by comparison with his earlier, more substantial Hopscotch; even in Rabassa's adept and sympathetic translation, Manuel seems to lack the intensity and rich ambience we look for in prime Cortázar."--Kirkus$

جزئیات و درخواست

By Julio Cortázar
Publisher: New York : Pantheon Books, 1978
Pages: 408
Language: en
OTHER:UTEXAS:059173027902603
Subject: Kidnapping

LAS TOP 100 MUJERES LÍDERES

جزئیات و درخواست

By Mercedes Wullich
Publisher: Editorial Almuzara, 2015
Pages: 305
Language: es
ISBN_13:9788483562819
ISBN_10:8483562812
Subject: Business & Economics

Intraocular Lens Calculations

$Zusammenfassung: Cataract surgery, with 25-30 million surgeries per year, has become one of most popular surgeries in the world. The calculation of its power is of utmost importance. As new premium intraocular lenses (IOLs) and modern surgical techniques have been developed, the demand has grown exponentially - not only for eliminating cataracts, but also for getting rid of the need for glasses. This book offers a comprehensive overview of IOL power calculations and its various formulas and methods. Chapters discuss use of the diagnostic biometry devices that provide the measurements and the management of different clinical situations where particular modifications must be applied. Chapters also discuss the newest generation of multifocal and toric IOLs that can only be implanted if no residual refraction is planned for, which implies a perfect mastery of all the IOL calculation process. This book marks the first time in ophthalmological history that all the main leaders in the field have collaborated in a project that will undoubtedly be the reference for the next ten years. Intraocular Lens Calculations is a must-have resource for cataract and refractive surgeons as well as technicians and anyone dealing with this subject$

جزئیات و درخواست

By Jaime Aramberri
Publisher: Springer Nature, 2024
Pages: 1002
Language: en
ISBN_13:9783031506666
ISBN_10:3031506669
Subject: Intraocular lenses

Acta Physica Polonica

جزئیات و درخواست

2002
Pages: 482
Language: en
OTHER:UOM:39015054013076
Subject: Physics

Raccontala a un'altra!

جزئیات و درخواست

By Raquel del Pilar Antúnez Cazorla
Publisher: Babelcube Inc., 2017-12-17
Pages: 242
Language: it
ISBN_13:9781547502530
ISBN_10:1547502533
Subject: Fiction

Global Health Watch 6

In the Shadow of the Pandemic

جزئیات و درخواست

By Bloomsbury Publishing
Publisher: Bloomsbury Publishing, 2022-04-21
Pages: 489
Language: en
ISBN_13:9781913441227
ISBN_10:1913441229
Subject: Medical

Customized Corneal Ablation

The Quest for SuperVision

جزئیات و درخواست

By Scott MacRae, Ronald R. Krueger
2001
Pages: 424
Language: en
OTHER:UOM:39015049738613
Subject: Medical

Creando valor a través de las personas

Una guía para la gestión de personas en el umbral de la e-so...

جزئیات و درخواست

By Alfonso Jiménez Jiménez
Publisher: Ediciones Díaz de Santos, 2013-06-15
Pages: 499
Language: es
ISBN_13:9788499696218
ISBN_10:849969621X
Subject: Business & Economics

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