Download or read book Corneal Topography in Clinical Practice Pentacam System Basics and Clinical Interpretation written by Mazen M Sinjab and published by JP Medical Ltd. This book was released on 2012-05-18 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Step by Step Reading Pentacam Topography written by Mazen M Sinjab and published by Jaypee Brothers Medical Publishers Pvt. Limited. This book was released on 2015-01-31 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 revised to present ophthalmologists with the latest advances in the interpretation of corneal topography using the Pentacam. Beginning with discussion on various devices that may be used for corneal topography, the following sections explain accurate interpretation of the images for diagnosis and treatment. The new edition includes two new chapters on the use of Pentacam topography for refractive surgery patients. The final section presents clinical case studies to assist understanding. Key points New edition presenting latest advances in interpretation of Pentacam topography Includes two new chapters on Pentacam for refractive surgery patients Features case studies to enhance understanding Previous edition published in 2010
Download or read book Step by Step Reading Pentacam Topography written by Mazen M Sinjab and published by JP Medical Ltd. This book was released on 2020-12-16 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third edition of this bestselling book has been fully revised to present ophthalmologists with the latest advances in the interpretation of corneal topography using the Pentacam.
Download or read book Elevation Based Corneal Tomography written by Michael W. Belin and published by JP Medical Ltd. This book was released on 2012-05-18 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a concise guide to elevation based tomographic imaging for ophthalmologists and cataract surgeons. Beginning with an introduction and overview of its evolution, the following chapters explain how to understand and interpret the data presented. Various procedures for different conditions are discussed, including the use of Pentacam for cataract disorders. With contributions from internationally renowned authors, this new edition includes more than 200 colour images and illustrations. The final section is a glossary of important terminology.
Download or read book Corneal Topography written by Melanie Corbett and published by Springer. This book was released on 2019-06-11 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Dr Agarwal s Textbook on Corneal Topography written by Amar Agarwal and published by JP Medical Ltd. This book was released on 2015-05-10 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Reading Pentacam Topography written by Mazen M. Sinjab and published by Jaypee Brothers Medical Pub. This book was released on 2009-10-30 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corneal Biomechanics written by C.J. Roberts and published by Kugler Publications. This book was released on 2017-05-15 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Keratoconus Keratoectasia written by Ming Wang and published by SLACK Incorporated. This book was released on 2010 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the recent years, keratoconus and keratoectasis have become increasingly important diseases in ophthalmic practice due to the increasing number of keratorefractive surgery cases and the availability of new treatment modalities other than corneal transplantation. For both the genetic form of the disease (keratoconus) and the acquired form (keratoectasia), new modalities of diagnosis and treatments have become available, enabling physicians to treat these two ecstatic corneal diseases earlier and effectively, delaying or even avoiding major surgeries such as corneal transplantation. This book is a concise, well-illustrated and clinically indispensable guide for treating these two important corneal diseases.
Download or read book Corneal Topography written by Ming Wang and published by CRC Press. This book was released on 2024-06-01 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the rapid advancement of corneal topography and wavefront technologies and the increased application of corneal topography not only in refractive but also in premium IOL surgery, a new edition of the best-selling Corneal Topography: A Guide for Clinical Application in the Wavefront Era will be the foremost resource for both ophthalmologists and optometrists. In this Second Edition, Dr. Ming Wang, Dr. Tracy Swartz and over 50 contributors combine the important topics of refractive and premium lens surgeries and put corneal topography in the context of wavefront technology. With over 500 images, this edition gives special attention to the latest advances in these technologies. The state-of-the-art science and application of corneal topography for these anterior segment surgeries is well represented in Corneal Topography, A Guide for Clinical Application in the Wavefront Era, Second Edition, making it the latest and most comprehensive reference of these state-of-the-art technologies for refractive and for premium IOL surgery. Topographic and Wavefront Technologies Covered Include: • Placido disc-based topographic systems • Elevation-based topographic systems • Ultrasound-based topographic systems • OCT-based topographic systems • Topography and wavefront combined systems Topographic Applications Covered Include: • Topographies of corneal diseases, including post-RK/CK/LASIK/PRK • Topography-guided contact lens fitting • Topography application in refractive surgery and in premium IOL surgeries • Topographic guidance for corneal surgeries • Topography-guided custom treatments • Combined treatment strategies using topography and wavefront data • Future development of corneal topography in the wavefront era Updated and reorganized to reflect changes in the technology, Corneal Topography: A Guide for Clinical Application in the Wavefront Era, Second Edition is indispensible for all anterior segment surgeons, ophthalmologists, and optometrists.
Download or read book New Investigations in Ophthalmology written by Tanuj Dada and published by JP Medical Ltd. This book was released on 2017-03-22 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters in this book, contributed by various authors working at the best centers in India, provide the reader with the basic information about the recent investigations in the field of corneal diseases, glaucoma, cataract surgery, and radiological imaging modalities. The text has been simplified to include the indications of the new tests, optical principle, interpretations of the printout, advantages, disadvantages, available clinical studies and patient examples with a self-assessment quiz. Numerous clinical photographs have been added related to each investigation to aid the reader in grasping the clinical utility of these tests. -- Publisher.
Download or read book Diagnostics in Ocular Imaging written by Mehrdad Mohammadpour and published by Springer Nature. This book was released on 2020-11-13 with total page 743 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a new avenue in the field of ophthalmology and sheds light on the field of eye imaging. With the increasing availability of electronic devices and their important role in both personal and professional aspects of human life, there is a growing need for perfect vision. Ophthalmic imaging is a major tool for screening and documenting eye diseases in both medical and surgical fields of ophthalmology and is also of use for ophthalmologists around the globe. The number of eye-imaging devices has increased dramatically, however undiagnosed or poorly managed eye diseases remain a significant cause of ocular and visual problems worldwide. This essential guide addresses the need for a book that is dedicated to ophthalmic imaging, covering the cornea, glaucoma, retina and orbital imaging with updates on medical and surgical aspects of the topic.
Download or read book Atlas and Clinical Reference Guide for Corneal Topography written by Ming Wang and published by CRC Press. This book was released on 2024-06-01 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Keratoconus written by Jorge L. Alió and published by Springer. This book was released on 2016-12-28 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a degenerative disorder of the eye, keratoconus can cause substantial distortion of vision, with multiple images, streaking, and sensitivity to light all reported by patients. Keratoconus: Recent Advances in Diagnosis and Treatment updates ophthalmologists about the innovations that have occurred within the last decade, discussing the diagnostic imaging techniques that have been developed for keratoconus diagnosis, understanding of how examination techniques are related to the evolution of keratoconus, and how to indicate the different therapeutic tools that have been created for keratoconus over the last several years. Additionally, fundamentals for new diagnostic elements, based on the mathematical, physical and biomechanical data are analyzed in depth for a better understanding of the essential diagnostic steps for the clinician to guide patients towards the most adequate therapeutic tool in the case. Modern keratoplasty techniques, assisted by femtosecond lasers or other devices, are also covered and these techniques, along with the emerging conservative treatments, have added to more precise control of the evolution of the disease.
Download or read book Corneal Tomography in Clinical Practice Pentacam System written by Mazen M Sinjab and published by JP Medical Ltd. This book was released on 2021-05-31 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fourth edition provides the latest developments in corneal tomography using the Pentacam system.
Download or read book Considerations in Contact Lens Use Under Adverse Conditions written by National Research Council and published by National Academies Press. This book was released on 1991-02-01 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes current understanding of the scientific, clinical, and technical issues surrounding the use of contact lenses. It discusses the special occupational conditions experienced by military personnel, particularly in extreme environments, that give rise to the question of whether or not to use contact lenses. Experts in optometry, ophthalmology, visual psychophysics, and engineering describe recent developments in design and use; and representatives of the military services provide examples of actual situations in aerospace settings. Considerations in Contact Lens Use Under Adverse Conditions will be of particular interest to those involved in the design of contact lenses and those responsible for occupational safety and health matters in the private sector.
Download or read book Customized Laser Vision Correction written by Mazen M. Sinjab and published by Springer. This book was released on 2018-06-04 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses customized laser vision correction, an integral management option for the treatment of irregular corneas. This type of treatment reshapes the corneal surface in order to improve both the quality and the quantity of vision by reducing high order aberrations. Beginning with an introduction to the basics of this science, each type of customized laser vision correction is discussed in a clear and didactic format for rapid attainment of information. Throughout this practical clinical guide, examples are supported with the most recent scientific material and a step-by-step systematic methodology is included to fit all levels of ophthalmologists.
