Corneal Topography

Author: Melanie Corbett
Editor: Springer
ISBN: 3030106969
File Size: 14,94 MB
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The new edition of this leading text atlas on corneal topography has been updated to include the latest advances in technology, such as Pentacam and Orbscan. The principles and theory underlying each technology are first clearly explained, and clinical applications are then examined. The authors describe how to use the different technologies and devices, explain the clinical readout with illustrations of normal corneal topography, discuss applications and findings in common disease states, and present the appearances after various corneal surgical procedures. The pros and cons of each system are highlighted. This up-to-date, superbly illustrated book is the most comprehensive guide to corneal topography currently available. It is anticipated that this second edition will become the seminal corneal topography textbook for all with an interest in corneal disease and its management, and refractive surgery.

Corneal Topography

Author: A. Kilic & C.J. Roberts
Editor: Kugler Publications
ISBN: 9062992307
File Size: 31,74 MB
Format: PDF, ePub
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Preface Kılıç and Roberts have assembled a strong team of experts to create a treatise of extraordinary value to the eye care professionals. Modern corneal topography is presented from the fundamental concepts, to the descriptions of representative instruments available, to a selection of the many applications to which this technology has applied itself. The field began as a quest to show the pioneers of keratorefractive surgery how the corneal surface was surgically altered. This provided guidance for the remarkable achievements that followed. Corneal topography transitioned into the diagnostic arena to make the critically important diagnosis of keratoconus and other ectatic degenerative diseases to improve the safety of refractive surgery. Corneal topography data have become a precise guide for corneal laser ablation by coupling individual corneal elevation data to control laser sculpting of tissue. Accurate knowledge of corneal shape has altered the way we fit contact lenses in difficult cases. Corneal topography standards have been published or are in progress by the American National Standards Institute (ANSI), the International Organization for Standardization (ISO), and the Digital Imaging and Communications in Medicine (DICOM) workgroup. This underscores the fact that corneal topography is a mature science and a worldwide standard in anterior segment practice. However, we are not yet done. Improvements in the sensitivity and accuracy with the reflectiontype devices, slit–based devices, and interferometry-based instruments are nearly within our grasp. Adjunct technologies provide independent measurements that help to provide additional clues for early detection of corneal dystrophies. The availability of accurate global corneal pachymetry is an essential tool with which to detect abnormalities in corneal thickness that can be the only sign of impending disease. Biomechanical analysis is starting to yield clues about the efficacy of the stiffening effects of the corneal crosslinking procedures. Intelligent algorithms are incorporating combinations of available attributes for automatic diagnostics. Genetic analysis may eventually provide the clues necessary to forecast corneas prone to the development of an ectatic degenerative condition that weakens the stroma. In a field that began with the observation of distortions of window reflections from patients' corneas, we have come a long way. But with apologies to Robert Frost: we have "... miles to go before ..." we "... sleep." Stephen D. Klyce

Corneal Topography In Clinical Practice Pentacam System Basics And Clinical Interpretation

Author: Mazen M Sinjab
Editor: JP Medical Ltd
ISBN: 9350255758
File Size: 61,57 MB
Format: PDF, Docs
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Corneal topography is a non-invasive medical imaging technique for mapping the surface curvature of the cornea, the outer structure of the eye. This procedure may be carried out with a Pentacam, which uses a rotating camera to create a 3D image of the anterior of the eye. This second edition has been fully updated to provide the latest developments in corneal topography and tomography using the Pentacam machine. Beginning with an introduction, the following sections describe the fundamentals of corneal topography and use of the Pentacam with different ophthalmic disorders. With nearly 250 high quality, colour images and illustrations, this concise guide is especially useful to graduate and postgraduate students in learning how to read and interpret corneal topography.

Corneal Topography

Author: David J. Schanzlin
Editor: Springer Science & Business Media
ISBN: 1461227666
File Size: 53,41 MB
Format: PDF
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Corneal Topography is designed to provide complete, practical coverage of a new field for both the general ophthalmologist and the subspecialist in the area of corneal disease. The volume explores the history of corneal topography and comprehensively demonstrates the usefulness of all forms of current instrumentation in clinical and ivestigative work striving toward improved surgical intervention in the cornea

An Atlas Of Corneal Topography

Author: Donald R. Sanders
Editor: Slack Incorporated
ISBN:
File Size: 35,14 MB
Format: PDF
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Corneal Topography

Author: Amar Agarwal
Editor: Anshan Pub
ISBN: 9781905740109
File Size: 16,18 MB
Format: PDF, Kindle
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This mini atlas is an edited collection of the latest information on corneal topography written by international contributors from the USA, Europe and India. The main issue in refractive surgery is the pre-operative assessment and for that topography is essential. This concise textbook provides information on the Orbscan topography unit and its usefulness in predicting and diagnosing ectasia, the Pentacam topography unit, the relation between and usefulness of both topography and wavefront aberrometry and the use of topography in cataract surgery. Each chapter contains copious colour images to illustrate the text, a total of 180 throughout the book, and they can also be viewed on screen using the free CD Rom. In brief, this mini atlas is an outstanding pocket reference for ophthalmic practitioners.

Corneal Topography

Author: Ming Wang
Editor: Slack
ISBN: 9781556429705
File Size: 36,65 MB
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Rev. ed. of: Corneal topography in the wavefront era / edited by Ming Wang; coordinated by Tracy Swartz. c2006.

Corneal Topography

Author: Lucio Buratto
Editor: Slack Incorporated
ISBN:
File Size: 18,92 MB
Format: PDF, ePub
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Computerized corneal topography in keratoconus/keratoscopic errors/contact lens & computerized corneal topography/etc.

Color Atlas Of Corneal Topography

Author: Yaron S. Rabinowitz
Editor: Igaku-Shoin Medical Publishers
ISBN: 9784260142359
File Size: 11,70 MB
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Corneal Topography

Author: Aylin Kiliç
Editor:
ISBN: 9789062992300
File Size: 28,46 MB
Format: PDF, Kindle
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PrefaceKiliç and Roberts have assembled a strong team of experts to create a treatise of extraordinary value to the eye care professionals. Modern corneal topography is presented from the fundamental concepts, to the descriptions of representative instruments available, to a selection of the many applications to which this technology has applied itself. The field began as a quest to show the pioneers of keratorefractive surgery how the corneal surface was surgically altered. This provided guidance for the remarkable achievements that followed. Corneal topography transitioned into the diagnosti.

Corneal Topography

Author: James P. Gills
Editor: Slack Incorporated
ISBN:
File Size: 30,86 MB
Format: PDF, Mobi
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This text shows how corneal topography can be used in radial and astigmatic keratotomy, cataract surgery, penetrating keratoplasty and several combined procedures. It focuses on the quality of the images, methods of analysis and the required accuracy of corneal topography.

Cumulated Index Medicus

Author:
Editor:
ISBN:
File Size: 79,91 MB
Format: PDF, ePub, Mobi
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Atlas And Clinical Reference Guide For Corneal Topography

Author: Ming Wang
Editor: Slack
ISBN: 9781617110276
File Size: 38,75 MB
Format: PDF, ePub, Mobi
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Corneal topography has become essentially a pattern recognition trade, best learned by viewing multiple images of representative patterns. In spite of this, currently available topography books focus only on the technology behind topography, or a particular application of topography, as opposed to presenting a comprehensive collection of topographic patterns that provide quick, consistent pattern recognition and identification. Drs. Wang and Kugler, along with Drs. Morgan and Boerman, look to fill this void with Atlas and Clinical Reference Guide for Corneal Topography. Atlas and Clinical Reference Guide for Corneal Topography is the first corneal topography book that lends itself to efficient image search and reference for busy clinicians at chair side. Organized into both map-based and disease-based sections, the book allows for quick reference in busy clinical situations. Images come from the commonly used topographers, the Zeiss Atlas and the Oculus Pentacam, but the principles of pattern recognition can be applied to any topographer. Due to the text's large collection of topographic images and corresponding corneal conditions, Atlas and Clinical Reference Guide for Corneal Topography can be used side by side with the topographer. Designed as both a learning tool for students and a reference for clinicians to use when faced with a challenging topography interpretation, Atlas and Clinical Reference Guide for Corneal Topography will be appreciated by a wide spectrum of eye care professionals. General ophthalmologists, cataract and refractive surgeons, corneal specialists, optometrists, and ophthalmology residents and students will benefit from this invaluable atlas for corneal topography.

Corneal Topography In The Wavefront Era

Author: Ming Wang
Editor: Slack Incorporated
ISBN: 9781556427527
File Size: 30,77 MB
Format: PDF, ePub, Docs
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Understanding corneal topography is essential for an anterior segment surgeon, general ophthalmologist and optometrist. Corneal Topography PDF CD-ROM delivers the information needed to develop an understanding of the state-of-the-art corneal topographic technology and its relationship to keratorefractive surgery. As the popularity of wavefront sensing continues to rise, it is important to keep pace with the latest developments in corneal topography, which remains an indispensable part of anterior segment ophthalmology practice. The improvement in corneal topographic and wavefront-sensing technologies coupled with the advent of an innovative custom treatment approach using these two technologies has ushered in a new era of cornea and refractive surgery with unprecendented superior clinical outcomes. In response to the need for an updated corneal topography reference, Dr. Ming Wang organized a team of over 30 of the field's leading professionals to produce this informative and comprehensive text. Inside Corneal Topography PDF CD-ROM, you will find a comprehensive review of the science of corneal topography and principles and application of all major topographic imaging systems currently available. Emphasis is placed on clinical use of these topographic systems in addition to pre- and postoperative evaluation and management of refractive surgery patients. New technologies such as topography-guided and combined wavefront and topography-guided custom treatments are presented. The clinical case presentations reinforce the key scientific concepts discussed early in the text as well as serve as a rapid and easy-access reference for the most common examples of topographic problems found in anterior segment and refractive surgery patients. Color figures and topographical maps are extensively used to illustrate the types and features of corneal topography and clinical case presentation. In today's wavefront era, it is important to understand the role of corneal topography in the anterior segment and refractive surgery practice. Corneal Topography PDF CD-ROM's focus and scope makes it a must-have reference for all ophthalmologists and optometrists. Topics Include: Anatomy and physiology of the cornea Classification of topographic technologies Scales and conventions used in corneal topography Principles and applications of major types of corneal topographies Clinical case presentation of commonly encountered problems in anterior segment and refractive surgery Posterior corneal changes in refractive surgery New technology in corneal topography - driven treatment New technologies in combined custom treatment approach using corneal topography and wavefront sensing. Features on the PDF CD-ROM: Includes the full-text! Includes all images! User-friendly PDF Format! System Requirements For Windows Users Only: Intel Pentium processor Microsoft Windows 95 OSR 2.0, Windows 98 SE, Windows Millennium Edition, Windows NT 4.0 with Service Pack 5, Windows 2000, or Windows XP 64MB of RAM 24MB of available hard-disk space Adobe Acrobat Reader 5 or above (included)

Corneal Topography Matching By Iterative Registration

Author:
Editor:
ISBN:
File Size: 63,51 MB
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Videokeratography is used for the measurement of corneal topography in overlapping portions (or maps) which must later be joined together to form the overall topography of the cornea. The separate portions are measured from different viewpoints and therefore must be brought together by registration of measurement points in the regions of overlap. The central map is generally the most accurate, but all maps are measured with uncertainty that increases towards the periphery. It becomes the reference (or static) map, and the peripheral (or dynamic) maps must then be transformed by rotation and translation so that the overlapping portions are matched. The process known as registration, of determining the necessary transformation, is a well-understood procedure in image analysis and has been applied in several areas of science and engineering. In this article, direct search optimisation using the Nelder–Mead algorithm and several variants of the iterative closest/corresponding point routine are explained and applied to simulated and real clinical data. The measurement points on the static and dynamic maps are generally different so that it becomes necessary to interpolate, which is done using a truncated series of Zernike polynomials. The point-to-plane iterative closest/corresponding point variant has the advantage of releasing certain optimisation constraints that lead to persistent registration and alignment errors when other approaches are used. The point-to-plane iterative closest/corresponding point routine is found to be robust to measurement noise, insensitive to starting values of the transformation parameters and produces high-quality results when using real clinical data.

Dr Agarwal S Textbook On Corneal Topography

Author: Amar Agarwal
Editor: JP Medical Ltd
ISBN: 9351527859
File Size: 45,11 MB
Format: PDF, Mobi
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Corneal topography is a non-invasive medical imaging technique for mapping the surface of the cornea. Dr Agarwal’s Textbook on Corneal Topography is the latest edition of this comprehensive guide to the capabilities of this type of imaging. Divided into six sections, the first is an introduction to corneal topography and orbscan. The following sections cover specific imaging techniques and related issues including orbscan and refractive surgery, pentacam and anterior segment optical coherence tomography, aberropia, aberrations and topography, and refractive procedures and conditions. The final chapter covers corneal topography in cataract surgery. This third edition is thoroughly updated with four brand new chapters. Section Three on pentacam and anterior segment OCT includes new chapters on corneal inflammation and optical coherence tomography, optical coherence tomography and corneal ectasia, and spectral-domain anterior segment optical coherence tomography in refractive surgery. The final section includes an OCT assessment of glued IOL position. This highly illustrated guide to the latest developments in the field of corneal topography includes nearly 400 full colour images, making Dr Agarwal’s Textbook on Corneal Topography an essential resource for ophthalmologists. Key Points Comprehensive guide to the latest technological developments in corneal topography New edition includes four brand new chapters Nearly 400 full colour images and illustrations Previous edition published 2010

Corneal Topography In The Wavefront Era

Author: Ming X. Wang
Editor: SLACK Incorporated
ISBN: 9781556427183
File Size: 18,63 MB
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Comprehensive review of the scientific principles of major corneal topography and clinical application of all major topographic imaging systems currently available. Emphasis is placed on the understanding of the principles and clinical guidance in the use of these technologies for addressing important clinical issues, such as an in-depth discussion and practical topography guide for recognition of forme fruste keratoconus.

Corneal Disorders

Author: Howard M. Leibowitz
Editor: W B Saunders Company
ISBN:
File Size: 61,29 MB
Format: PDF
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Here's the fully revised and updated 2nd Edition of one of the most popular resources in the field! This comprehensive, authoritative reference delivers detailed discussions of the most commonly encountered diseases, abnormalities, and trauma of the cornea. It synthesizes superb coverage of essential basic science and technical information with detailed guidelines on the diagnosis and clinical management of each entity. It also features a wealth of new topics and new features, as well as a superb art program. brand-new coverage of: the latest advances inrefractive corneal surgery, confocal microscopy, corneal topography, clinical evaluation of corneal abnormalities and their effects on vision, pathological responses of the cornea, differential diagnosis of localized deposits in the cornea, corneal pigmentation, immunological disorders of the cornea, parasitic keratitides, including Acanthamoeba, mechanical and radiational corneal trauma, mucocutaneous disorders, the cornea in systemic disease, corneal procedures, keratoprosthesis implantation, and more. Provides step-by-step, fully illustrated guidelines on using the slit lamp microscope to examine the cornea. This feature is not available in other current books. Describes the structural and functional components of the operating microscope--not available in other current references. Provides detailed, how-to coverage of the full range of diagnostic and therapeutic procedures. Surpasses other resources on the subject in both depth and organization of coverage. Equips readers with a quick-reference guide to the findings in the most common forms of corneal drug toxicity. Delivers over 1075 illustrations--110 in full colour--that pilot readers through key disorders and procedures.

Step By Step Corneal Topography

Author: Sunita Agarwal
Editor: CRC Press
ISBN: 9781841845470
File Size: 64,29 MB
Format: PDF, Mobi
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Given that most ophthalmic surgeons have at some time in their careers struggled with reading a corneal topography map and attempting to ascertain if it is normal or abnormal, this handy step by step guide to corneal topography is an excellent aide-memoire. The illustrious Agarwal family cover the common use of corneal topography - keratoconus detection – as well as more unique areas such as the extensive use of corneal topography for cataract surgery and phakonit, as well as posterior corneal topography, and aberropia. Going one step further than many other texts in the field, this impressive guide also presents splendid information on the use of topography for aberrometry-guided excimer laster applications. Making the difficult and often confusing mixture of art and science that is corneal topography seem more manageable in day-to-day practice, Step by Step Corneal Topography is undoubtedly requisite reading for all ophthalmologists.

Cornea

Author: Jay H. Krachmer
Editor: Mosby Incorporated
ISBN:
File Size: 37,62 MB
Format: PDF, Mobi
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This comprehensive three-volume text covers every aspect of the cornea and external eye: basic science, examination and imaging, eye banking, diagnosis, and medical and surgical management. It is edited by three leaders in corneal disease. Computer enhanced images and artists' drawings supplement the text. Most complete and largest reference published on the cornea. Every aspect of the cornea is covered in this three volume, contributed text: basic science, medical, and surgical, plus practical overviews of eye banking and examination techniques Edited by three nationally renowned corneal specialists who are deemed to be leaders in the ophthalmic community. Computer enhanced illustrations throughout the text. Only reference on the cornea to have a corresponding full-color atlas and slides. Extensive sections on eye banking and corneal manifestations of systemic disease. Extensive up to date reference lists accompany each chapter. Carefully reviewed and tightly edited by the editors