This book, designed for ophthalmologists and particularly for refractive surgeons, aims to develop practical and clinical skills in readers so that they are able to make the right decisions in managing keratoconus. There are four main chapters. The first is devoted to diagnosis and describes the clinical signs, the appearances on microscopy, and the significance of corneal hysteresis and corneal topography. Classifications and patterns of keratoconus are then presented, and the author offers his own new classification of topographic patterns. The third chapter addresses the management of the disease in detail. Both non-interventional and interventional approaches are discussed with due attention to contraindications and complications. In addition, a novel classification of management parameters is suggested, and a systematic approach to management, formulated. In the final chapter this approach is applied to nine cases that serve as clinical examples.

Preserve your vision, do more than just get contact lenses, improve your eye health by improving your overall health. A comprehensive guide designed for people suffering from degenerative eye conditions like keratoconus, keratoglobus or pellucid marginal degeneration. The guide focuses on stress, nutrition, herbs, supplements and eye exercises. It also introduces you to two great healing traditions: traditional Chinese medicine and Ayurvedic medicine from India. Focusing on a holistic view of the body, I provide guidance designed to help you be more informed, more aware and in control of your condition.

Corneal tomography 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 third edition has been fully updated to provide the latest developments in corneal tomography using the Pentacam system. Beginning with an introduction, the following sections cover corneal maps and profiles, corneal refraction, Wavefront analysis, systematic interpretation of corneal tomography, and corneal tomography in ectatic corneal diseases. The final section explains the Holladay Report, and corneal tomography and aberrometry in cataract surgery. Presented in a step by step format the new edition of this popular manual also includes discussion on false positives and false negatives. Authored by recognised expert Mazen M Sinjab, the book features nearly 350 high quality, colour images and illustrations. Key points Fully revised, third edition presenting latest advances in corneal tomography using the Pentacam system Presented in step by step format with nearly 350 images and illustrations Authored by recognised expert Mazen M Sinjab Previous edition (9789350255759) published in 2012

Blindness and vision impairment affect at least 2.2 billion people worldwide with most individuals having a preventable vision impairment. The majority of people with vision impairment are older than 50 years, however, vision loss can affect people of all ages. Reduced eyesight can have major and long-lasting effects on all aspects of life, including daily personal activities, interacting with the community, school and work opportunities, and the ability to access public services. This book provides an overview of the effects of blindness and visual impairment in the context of the most common causes of blindness in older adults as well as children, including retinal disorders, cataracts, glaucoma, and macular or corneal degeneration.

Offering practical clinical guidance for early diagnosis and effective management, Keratoconus: Diagnosis and Management is a concise, easy-to-read guide to help mitigate loss of vision in patients in a way that does not interfere with quality of life. From early diagnosis and intervention through the most up-to-date treatment and surgical approaches, this consolidated reference covers the essential information needed by cornea fellows and specialists, general ophthalmologists, residents, and optometrists. - Provides expert, step-by-step guidance and real-world perspectives from global contributors in the field. - Covers the latest advances in cornea transplantation, corneal collagen cross-linking (CXL) in adult and pediatric patients, intrastromal corneal rings, intraocular lenses, corneal regeneration, and laser surgery. - Includes quick-reference boxes throughout highlighting essential clinical facts, pitfalls, potential complications, and clinical guidelines. - Presents real-world case studies of actual patient scenarios from early to advanced disease states. - Features high-quality imaging for keratoconus at various stages, including OCT, Brillouin scanning microscopy, Scheimpflug and combined Placido and Scheimpflug, combined Placido and AS-OCT, clinical and surgical photos, and more.

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.

This book introduces research presented at the International Conference on Distributed Computing and Optimization Techniques (ICDCOT–2021), a two-day conference, where researchers, engineers, and academicians from all over the world came together to share their experiences and findings on all aspects of distributed computing and its applications in diverse areas. The book includes papers on distributed computing, intelligent system, optimization method, mathematical modeling, fuzzy logic, neural networks, grid computing, load balancing, communication. It will be a valuable resource for students, academics, and practitioners in the industry working on distributed computing.

Refractive surgery is eye surgery to improve the refractive state of the eye and reduce or eliminate the need for glasses or contact lenses. The most common type of refractive surgery uses lasers to reshape the curvature of the cornea. This book is a comprehensive guide to refractive surgery. Presented in five steps, it begins with discussion on corneal imaging and its clinical application. The second step examines key refractive procedures and step three offers advice on rules and guidelines for refractive surgery. Step four is a guide to actually starting the procedure and avoidable complications. The final section describes a clinical case study. Enhanced by nearly 500 high quality images, diagrams and tables, each chapter includes key points and clinical tips to assist understanding. Key points Comprehensive guide to refractive surgery Presented in step by step format Key points and clinical tips in each chapter Includes nearly 500 images, diagrams and tables

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.

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.