Download or read book Corneal Collagen Cross Linking for Keratoconus in Pediatric Patients Long Term Results written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corneal Collagen Cross Linking written by Mazen M. Sinjab and published by Springer. This book was released on 2016-11-09 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides comprehensive coverage of corneal collagen cross-linking (CXL), a major management modality for keratoconus and ectatic corneal disorders. All aspects are covered, including refractive and non-refractive surgery indications, models of application, safety, efficacy, performance, outcome measures, evidence of CXL, complications, contraindications, use in children, and controversies. The discussion reflects the considerable progress that has been made in understanding of the modality since its development in the late 1990s. Detailed attention is paid to new concepts, changing surgical techniques and indications, the latest evidence-based science and research, and the future of CXL. Guidance is also provided on the use of CXL in combination with other modalities, such as LASIK, PRK, intracorneal ring implantation and others. The text is accompanied by numerous high-quality color illustrations. Corneal Collagen Cross Linking will provide the reader with a sound grasp of the technique and its use and will hopefully also serve as a stimulus to further research and advances.

Download or read book Corneal Collagen Crosslinking for Progressive Keratoconus in Pediatric Patients written by Joannie Irizarry Cortes and published by . This book was released on 2016 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the literature review is to examine the efficacy of corneal collagen crosslinking for progressive keratoconus in pediatric patients. Collagen crosslinking (CXL) is a technique that utilizes riboflavin and ultraviolet-A as an effective treatment option for progressive keratoconus in pediatric patients. Several articles have shown topographic results with statistically significant improvement in K readings and visual acuity on the patients. The procedure has proven to be safe on the pediatric population, even do there are studies conducted every day for improvement of it. CXL acts by reducing the mean refractive cylinder nd flatening the cornea, and appears effective in halting the progession of the disease. Ultimately, what is being study in the literature review is that crosslinking stabilizes the condition and, thus, reduces the need for corneal grafting in these young patients for a better and healthy vision.

Download or read book Femtosecond Laser Assisted Keratoplasty written by Jorge L Alio and published by JP Medical Ltd. This book was released on 2013-07-30 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keratoplasty is the transplantation of all or part of the cornea to repair scarred or damaged tissue. A femtosecond laser is a laser which emits ultrashort pulses, used for minimally invasive corneal surgery. This book is a concise guide to the technique of femtosecond laser-assisted keratoplasty. Beginning with an introduction to the technology, the following chapters discuss its use for different disorders. This practical text is based on the surgical experience of its internationally recognised authors from Spain, Germany, France and the USA. It includes more than 230 full colour clinical photographs and illustrations to enhance learning. Key points Concise guide to the corneal transplantation procedure of femtosecond laser-assisted keratoplasty Covers key technologies and uses for different disorders Internationally recognised author and editor team Includes more than 230 clinical photographs and illustrations

Download or read book Literature Review written by Gurkiran Gulati and published by . This book was released on 2014 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: First developed in Dresden, Germany, corneal collagen crosslinking (CXL) is a treament that has been around for approximately 15 years. CXL has been used to help slow the progression of actasia and has been used to stabilize corneal disorders such as, keratocconus, pellucid marginal degeneration, and ectasia after LASIK surgery. Due to the success rate and minimal side effects of CXL, researchers have been rying to increae the scope of the procedure to perhaps be used in pediatric keratoconus, keratitis, Fuchs corneal dystrophy, and potentially other corneal dystrophies. Several experimental and retrospective studies have been performed to assess the effects and results of CXL in these corneal dystrophies. Many of theses studies have found some benefits with the use of CXL early in patients with debilitating corneal diseases but how safe is the procedure and its is it effective long term?

Download or read book Controversies in the Management of Keratoconus written by Adel Barbara and published by Springer. This book was released on 2018-12-11 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents new technologies which are available now for the rehabilitation of visual acuity in patients suffering from keratoconusand for arresting the progression of this frustrating disease. All these current treatment options in differing combinations aim to improve the quality of life of the patients and although successful, they are causing confusion for the ophthalmologists; what procedure to do and when? How to perform? Which combination of treatments to choose? Controversies in the Management of Keratoconusprovidesthe widely used treatment options for keratoconus including collagen corneal cross –linking (CXL) covering all the available techniques, intrastromal corneal ring segments (ICRS) , phakic intra-ocular lenses (IOLs), photorefractive keratectomy (PRK) combined or not with CXL penetrating keratoplasty (PK) and deep anterior lamellar keratoplasty ( DALK). Each treatment is addressed by more than one author with different points of view in order to present the various approaches, the logic behind them and the most relevant clinical data available.A chapter by the editor tries to put some light on how to navigate among these controversies. This book will be of interest to trainees as well as the specialized ophthalmologists.

Download or read book Factors Influencing Progression of Keratoconus 2 Years After Corneal Collagen Cross Linking in Pediatric Patients written by and published by . This book was released on 2016 with total page 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 written by Edna Almodin and published by Springer Nature. This book was released on 2022-10-27 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keratoconus is a progressive disease of the cornea which can lead to blindness as irregular astigmatism increases. The study of the ectasic diseases of the cornea has evolved considerably in the last several years and this has brought new tools for the keratoconus diagnosis and treatment. A better understanding of treatment options can enhance visual rehabilitation and prevent blindness in these patients. This book provides the reader deeply and updated information on keratoconus treatment. Written by experts from worldwide, the book presents clinical, genetic, metabolic and biomechanical aspects in the development of the disease, the proper intervention time, the imaging tests used for diagnosis and keratoconus monitoring, as well as details on new surgical procedures (as contact lenses and laser technologies) using modern methods with wide technological application. Two pioneers in the keratoconus treatment bring their valuable contribution in specific chapters. Ophthalmologists will find a practical and useful approach of new technologies to get the best results for their patients. This book will really impact changes in the therapeutic conduct of corneal surgeons.

Download or read book Progressive Keratoconus Insights into Etiopathogenesis Diagnosis and Treatment written by and published by Frontiers Media SA. This book was released on 2023-11-29 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the early stages of keratoconus, visual acuity may be normal and slit-lamp examination is not able to identify the disease phenotype. Early diagnosis of keratoconus is of major importance for effective treatment. That is why corneal topography and tomography has become the gold standard examination for diagnosis of corneal ectasia. Corneal topography is a non-contact imaging tool that gives information about the anterior surface of the cornea. Corneal tomography evaluates both anterior and posterior corneal surfaces and is considered mandatory for preoperatory evaluation before refractive surgery. Until recently, Kmax was the main indicator for the progression of keratoconus, but recent studies showed that posterior elevation represents the first signal of an ectatic corneal disease. Cross-linking is considered the gold standard in the treatment of keratoconus and newer techniques allow this procedure to be selective on the areas of corneal thinning.

Download or read book Astigmatism written by Michael Goggin and published by BoD – Books on Demand. This book was released on 2012-02-29 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the development, optics and physiology of astigmatism and places this knowledge in the context of modern management of this aspect of refractive error. It is written by, and aimed at, the astigmatism practitioner to assist in understanding astigmatism and its amelioration by optical and surgical techniques. It also addresses the integration of astigmatism management into the surgical approach to cataract and corneal disease including corneal transplantation.

Download or read book Corneal Cross Linking written by Farhad Hafezi and published by CRC Press. This book was released on 2024-06-01 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corneal Cross-Linking, Second Edition represents an innovative approach to treating primary acquired and secondary induced ectatic disorders. In addition, corneal cross-linking (CXL) has promising applications as an alternative in the treatment of corneal infectious and non-infectious melting, as well as conditions such as Fuchs’ endothelial dystrophy. The new and expanded Second Edition of Corneal Cross-Linking by Drs. Farhad Hafezi and J. Bradley Randleman will provide a concise yet comprehensive summary of the CXL process, including the basic science foundations, treatment protocols and outcomes, recognition and management of potential complications, and modification of standard protocol for special circumstances. Given all the changes in this rapidly progressing field, many brief topics from the first edition have now grown into full chapters or sections. These include expanded sections on alternative treatment protocols, corneal imaging and biomechanics, combing cross-linking with other refractive treatments, and a section devoted specifically to the most highly debated controversies in the field today. With each chapter being fully updated plus including over twenty new chapters that covers the latest advances and future directions, Corneal Cross-Linking, Second Edition represents the cutting-edge of CXL research and clinical practice. “Since the publication of the first edition of this book in 2013, our knowledge of corneal cross-linking has again significantly increased, both scientifically and clinically. Today, concise recommendations (guidelines for cross-linking) help the clinician to select the patients, make decisions, and provide optimal treatment” -Eberhard Spoerl, PhD and Theo Seiler, MD, PhD

Download or read book Ocular Imaging written by George Asimellis and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Ophthalmology and Optometry E Book 2018 written by Myron Yanoff and published by Elsevier Health Sciences. This book was released on 2018-08-02 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Ophthalmology and Optometry reviews the most current practices in both ophthalmology and optometry. A distinguished editorial board, headed by Dr. Myron Yanoff, identifies key areas of major progress and controversy and invites expert ophthalmologists and optometrists to contribute original articles devoted to these topics. Broken into sections, the the third Volume in the series covers topics within each of the following categories: Optometry, Cataracts, Pediatrics, Ophthalmic Pathology & Ocular Oncology, Vitreoretinal Disease, Glaucoma, Neuro-ophthalmology, Oculoplastics, and Uveitis.

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 367 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 Keratoconus written by Sujata Das and published by Springer Nature. This book was released on 2022-10-19 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers various aspects of the management of keratoconus, which is a leading cause of visual impairment in young adults. It focuses on the epidemiology and risk factors of keratoconus with a special focus on Southeast Asia. Keratoconus affects the quality of vision, thereby affecting the quality of life. While most patients present with defective vision, many are diagnosed accidentally during screening for refractive surgery. The book covers the varied epidemiology of keratoconus across different parts of the world. It discusses many systemic and ocular diseases associated with keratoconus. The book covers the newer diagnostic techniques and various treatment procedures for keratoconus, helping in diagnosing keratoconus in the early stages and closely watching the progression. It discusses various contact lenses to improve vision quality; widely used collagen crosslinking, and its various modifications for halting the progression. It also explains the surgical approach for keratoconus, such as penetrating keratoplasty, lamellar keratoplasty and other lens-assisted procedures. The book is relevant for general ophthalmologists and cornea specialists.

Download or read book Contact Lenses written by Anthony J. Phillips and published by Elsevier Health Sciences. This book was released on 2018-11-29 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely revised with the latest advances, evidence, and standards needed for everyday practice, Contact Lenses, 6th Edition, remains a definitive work on this multi-faceted topic, ideal for optometrists, dispensing opticians, ophthalmologists, and contact lens practitioners. This classic, superbly designed text is perfectly suited for health care professionals, providing all of the essential knowledge needed in one convenient volume. Provides up-to-date, authoritative information on contact lens materials and lens types, treatment in contact lens and tear film complications, and myopia correction and contact lenses for abnormal ocular conditions. Discusses current topics such as miniscleral lenses, keratoconus, corneal cross linking, and paediatric, cosmetic and prosthetic contact lenses. Contains high-quality line diagrams and clinical illustrations to highlight key points in the text. Focuses on the evidence behind contact lens practice, enabling you to make informed choices about the care you give to your patients.