Optometri / optikere

Uveitis is an inflammation of the uvea, the middle layer of tissue surrounding the eye that consists of the iris, ciliary body, and choroid. The anatomical forms of uveitis are anterior, intermediate, posterior, or diffuse. Anterior uveitis is defined as inflammation of the iris and the anterior chamber. Intermediate uveitis is defined as inflammation of the ciliary body and vitreous humor (the jellylike filling in the anterior portion of the eye). Posterior uveitis is defined as the inflammation of the retina, choroid, or optic disc (where the optic nerve enters the retina). The major causes include an infection (viral, fungal, bacterial, or parasitic), systemic disease (typically an autoimmune disorder), or injury to the eye. The symptoms of uveitis consist of eye redness, eye pain, blurred vision, light sensitivity, floating spots, and decreased vision. Treatment consists of glucocorticoid steroids, either as topical eye drops (prednisolone acetate) or as oral therapy that relieves pain caused by spasms of the pupil-constriction muscle. The objective of this book is to give a general view of the different causes, symptoms, and treatment methodologies of uveitis. It will serve as a valuable source of reference for graduate and postgraduate students.

Oxidative stress occurs due to an imbalance between the systemic manifestation of the reactive oxygen species (ROS) and the biological system's ability to repair the subsequent damage or detoxify the reactive intermediates. The disturbances in the redox state of cells may lead to toxic effects by producing free radicals and peroxides, which harm all components of the cells, such as DNA, proteins, and lipids. Oxidative stress occurring due to oxidative metabolism causes strand breaks in DNA along with base damage. ROS generated hydrogen peroxide, superoxide radical and hydroxyl radical causes base damage indirectly. Oxidative stress is known to contribute to diabetes and its complications such as retinopathy. Diabetic patients with retinopathy are prone to acquired blindness. Oxidative stress can lead to development of proliferative diabetic retinopathy (PDR), also called diabetic macular edema, which may lead to visual impairment in DR patients. This book provides comprehensive insights on the role of oxidative stress in diabetic retinopathy. It will serve as a reference to a broad spectrum of readers.

How to use the iris of the eye as a diagnostic medical tool

Through five highly regarded editions, Ophthalmology, by Drs. Myron Yanoff and Jay S. Duker, has remained one of the premier texts in the field, providing authoritative guidance on virtually any ophthalmic condition and procedure you may encounter. The fully revised, 6th edition of this award-winning title continues to offer detailed, superbly illustrated content from cover to cover, with extensive updates throughout to keep you current with the latest advancements and fundamentals throughout every subspecialty area in the field. An easy-to-follow, templated format, convenient single volume, and coverage of both common and rare disorders make this title a must-have resource no matter what your level of experience. Offers truly comprehensive coverage, including basic foundations through diagnosis and treatment advances across all subspecialties: genetics, optics, refractive surgery, lens and cataract, cornea, retina, uveitis, tumors, glaucoma, neuro-ophthalmology, pediatric and adult strabismus, and oculoplastics.  Features streamlined, templated chapters, a user-friendly visual layout, and key features boxes for quick access to clinically relevant information and rapid understanding of any topic.  Contains four new chapters covering Phototherapeutic Keratectomy; IOL Optics; Bag-in-the-lens Cataract Surgery; and Capsulectomy: Modern devices apart from FLACS.  Includes a fully revised and updated chapter on refractive surgery screening and corneal imaging, as well as an expanded chapter on corneal cross-linking.  Provides up-to-date information on the latest advances in the field, including new therapies for retinoblastoma, such as intravenous and intraarterial chemotherapy; less common retinal tumor simulators of retinoblastoma; OCT-Angiography; glaucoma stents; new drug delivery platforms; IOL optics; phototherapeutic keratectomy; intraocular pressure monitoring; and more.  Includes more than 2,000 high-quality illustrations and an expanded video library with more than 60 clips of diagnostic and surgical techniques, including new videos of nystagmus.  Contains updated management guidelines for central retinal artery occlusions (CRAO).  Provides fresh perspectives from new section editors Drs. Carol Shields and Sumit (Sam) Garg.  Enhanced eBook version included with purchase. Your enhanced eBook allows you to access all of the text, figures, and references from the book on a variety of devices.

The field of contact lenses continues to evolve at a rapid pace, with new optical designs and vision correction options continually being developed. Additionally, the rapid expansion of clinical instrumentation offers eye care practitioners a wide choice of investigative techniques for assessing in-eye contact lens performance and diagnosing adverse reactions.   Now in its fourth edition, Contact Lens Practice has been thoroughly updated and revised to capture these developments and more, and translate them into an organised and easily digestible resource. Written and edited by award-winning author, researcher, and lecturer, Professor Nathan Efron, this title provides a comprehensive, evidence-based overview of the scientific foundations and clinical applications of contact lens fitting. The text has been refreshed by the inclusion of five new authors - a mixture of scientists and clinicians, all of whom are at the cutting edge of their specialty.  Serves as an essential companion and guide to current thinking and practice in the content lens field, ideal for use by optometrists, ophthalmologists, orthoptists, opticians, students, and contact lens industry professionals.   Presents subject matter in a clear and logical format to allow the reader to quickly identify and comprehend key information.   Features highly illustrated chapters in full colour, helping the reader to visualize core concepts.   Includes completely rewritten chapters, by new authors, on scleral and corneo-scleral contact lenses, high ametropia, therapeutic applications, post-surgical lens fitting, and practice management.  A new chapter on Post-Surgery Management consolidates core information on post-operative management involving contact lenses.   Enhanced eBook version included with purchase. Your enhanced eBook allows you to access all of the text, figures, and references from the book on a variety of devices.

This is James Compton Burnett 1889 treatise, ¿Cataract - Its Nature, Causes, Prevention, And Cure¿. Within it, he explores a variety of different reasons why cataracts develop, and outlines the ways in which they can be avoided, treated, and even cured. This book will appeal to those with an interest in the history and development of cataract treatment, and it is not to be missed by the discerning collector of vintage medical literature. Contents include: ¿Histogenesis of the Lens¿, ¿Optical Diagram of the Eye¿, ¿Definition of Cataract¿, ¿The Causes of Cataract¿, ¿The True Nature of Cataract¿, ¿Salt-Eating as a Cause of Cataract¿, ¿The Use of Sugar as a Cause of Cataract¿, ¿Hard Drinking-Water as a Cause of Cataract¿, ¿Cataract Caused by Salt¿, etc. Many vintage books such as this are becoming increasingly scarce and expensive. It is with this in mind that we are republishing this volume now in an affordable, modern, high-quality edition complete the original text and artwork.

Comprehensive and readable, Whitcup and Nussenblatt's Uveitis, 5th Edition, covers every aspect of this complex subspecialty in a single convenient volume. This clinically relevant guide covers the medical, pharmacological, and surgical treatment of uveitis in a visually rich, full-color format, offering a complete overview for today's clinicians. New and updated case studies, key points boxes, and more than 400 images and graphics highlight major clinical points and provide insight into real situations that you can apply in practice