Single and Multiple Stimulus Static Perimetry in Glaucoma; The Two Phases of Perimetry PDF Download
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Author: E.L. Greve
Publisher: Springer Science & Business Media
ISBN: 9401177651
Category : Medical
Languages : en
Pages : 367
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Book Description
does not vary more than 1 % over the whole surface. Stimulus: The luminance of the stimuli can be regulated by means of neutral density filters. These filters are neither entirely neutral nor completely uniform, but these variations are not significant for perimetry. The maximum luminance of the stimuli is standardized at 1000 asb (316 2 cd.m-). The standard GP for kinetic perimetry has 3 neutral density filters which reduce the luminance by 0.5, 1.0 and 1.5 log units respectively. The modification of the GP for static perimetry is supplied with an additional series of four neutral density filters, which allow luminance steps of 0.1, 0.2, 0.3 and 0.4 log units. The resulting luminance values, expressed in apostilb, are given in Table I. TABLE I Luminance values of the Goldmann perimeter 4 3 2 steps lux 1430 450 143 45 3,1 asb 1000 315 100 31,5 3,1 2 cd/m 315 100 31,5 10 3,1 ßL ±30 10 3 3,1 L log L asb 3 2,5 2 2 1,5 0,5 2 Background: 31,5 asb. = 10 cd/m • Coefficient of reflection 0,7. 1 2 (1 asb = -cd/m).
Author: E.L. Greve
Publisher: Springer Science & Business Media
ISBN: 9401177651
Category : Medical
Languages : en
Pages : 367
Get Book Here
Book Description
does not vary more than 1 % over the whole surface. Stimulus: The luminance of the stimuli can be regulated by means of neutral density filters. These filters are neither entirely neutral nor completely uniform, but these variations are not significant for perimetry. The maximum luminance of the stimuli is standardized at 1000 asb (316 2 cd.m-). The standard GP for kinetic perimetry has 3 neutral density filters which reduce the luminance by 0.5, 1.0 and 1.5 log units respectively. The modification of the GP for static perimetry is supplied with an additional series of four neutral density filters, which allow luminance steps of 0.1, 0.2, 0.3 and 0.4 log units. The resulting luminance values, expressed in apostilb, are given in Table I. TABLE I Luminance values of the Goldmann perimeter 4 3 2 steps lux 1430 450 143 45 3,1 asb 1000 315 100 31,5 3,1 2 cd/m 315 100 31,5 10 3,1 ßL ±30 10 3 3,1 L log L asb 3 2,5 2 2 1,5 0,5 2 Background: 31,5 asb. = 10 cd/m • Coefficient of reflection 0,7. 1 2 (1 asb = -cd/m).
Author: E.L. Greve
Publisher: Springer Science & Business Media
ISBN: 9789061931645
Category : Medical
Languages : en
Pages : 442
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Book Description
Author: C.T. Leffler
Publisher: Wayenborgh Publishing
ISBN: 9062999093
Category : Medical
Languages : en
Pages : 920
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Book Description
The History of Glaucoma, the latest in the Hirschberg series of the history of ophthalmology, covers the twists, turns, and paradigm-shifts in the glaucoma concept over the past two millennia. Previously, scholars were not able to agree on how the term glaucoma, which related in antiquity to the color of a diseased eye, ended up describing an excavated optic neuropathy which has nothing to do with color. The volume begins in the ancient world, and proceeds all the way to the modern era of optical coherence tomography, minimally invasive surgery, and anti-VEGF agents. Ophthalmic historians and glaucoma specialists from the United States, Europe, Asia, and Latin America have contributed their scholarship and recollections to this volume, which includes photographs from private collections, information from unpublished documents, and new translations from Latin, Arabic, French, German, and Spanish. The work of masters such as Julius Hirschberg and Max Meyerhof is supplemented by the latest scholarship, which has benefited from the explosion in digitally-accessible historical documents. This new scholarship has upended many deeply rooted beliefs about ophthalmology history. Most important, the volume relates the personal stories of eye surgeons and patients, to bring the past to life. The History of Glaucoma is a must-have for anyone interested in medical history.
Author: E.L. Greve
Publisher: Springer Science & Business Media
ISBN: 9789061931546
Category : Medical
Languages : en
Pages : 502
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Book Description
Author: Mark Rosenfield
Publisher: Elsevier Health Sciences
ISBN: 0750687789
Category : Medical
Languages : en
Pages : 569
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Book Description
An introduction to the theory and practice of optometry in one succinct volume. From the fundamental science of vision to clinical techniques and the management of common ocular conditions, this book encompasses the essence of contemporary optometric practice. Now in full colour and featuring over 400 new illustrations, this popular text which will appeal to both students and practitioners wishing to keep up to date has been revised significantly. The new edition incorporates recent advances in technology and a complete overview of clinical procedures to improve and update everyday patient care. Contributions from well-known international experts deliver a broad perspective and understanding of current optometric practice. A useful aid for students and the newly qualified practitioner, while providing a rapid reference guide for the more experienced clinician. Comprehensive and logical coverage detailing the full spectrum of optometric practice in one volume. Succinctly covers the basics of anatomy, physiology, pharmacology, investigative techniques and clinical management of common eye conditions to provide key topics likely to be met in clinical practice. Discusses the full range of refractive correction, from spectacles and contact lenses to surgical treatment. Includes chapters on the management of special populations, including paediatric, elderly, low vision and special needs patients. Heavily illustrated throughout with key diagrams and images to support the text. Complete restructuring of contents into three sections: basic sciences, clinical techniques and patient management. Full colour throughout with over 400 illustrations. Many new chapters reflecting the changes in optometric practice and technology over the last 20 years, including new imaging and diagnostic procedures and methods of ocular treatment and refractive correction. Now includes internationally renowned authors from around the world. Details a full range of refractive and management approaches for patient care.
Author: John R. Samples
Publisher: Springer Science & Business Media
ISBN: 1461441722
Category : Medical
Languages : en
Pages : 672
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Book Description
Glaucoma Clinical Care: The Essentials is a pragmatic, slimmer companion volume to the more academically focused text “The Glaucoma Book” by the same editors. This new book is a thoroughly updated manual for the day-to-day diagnosis and management of glaucoma patients by comprehensive ophthalmologists and optometric physicians. Its 33 chapters are authored by world renowned experts in clinical care and basic research, providing evidenced-based research, office examination skills, clinical pearls, and up-to-date reviews of the scientific literature on glaucoma, as wel l as extensive graphics and tables to accompany the text. Glaucoma Clinical Care: The Essentials is the one book to have and consult when confronted with a problematic glaucoma patient sitting in your exam chair as it is a thorough presentation of glaucoma medications, laser, and incisional glaucoma surgeries, complete with commentaries on advantages and disadvantages of the different therapies.
Author: Robert Cubbidge
Publisher: Elsevier Health Sciences
ISBN: 0750688513
Category : Medical
Languages : en
Pages : 127
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Book Description
Eye Essentials is a new series of texts which provides authoritative and accessible information for all eye care professionals, whether in training or in practice. Each pocket guide is both a rapid review tool for students and a handy clinical reference guide for practitioners. With features such as tables, key bullet points, clinical pearls, practice pitfalls, summaries, action icons and stunning full color illustrations, this series has rapidly established itself as an excellent source of essential information for today's readers. Practical guidance that is evidence basedFull-color illustrations clarify key informationHighlighted advice sections for patients and handy tables throughoutAuthoritative guidance on visual fields from a respected leader in the fieldProvides essential information in one convenient review source
Author: D. F. Edgar
Publisher: Elsevier Health Sciences
ISBN: 075063782X
Category : Medical
Languages : en
Pages : 208
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Book Description
Provides detailed methods of clinical examination techniques and their interpretation together with a detailed description of the histopathology, physiology and visual functional changes in glaucoma.
Author: G.K. Krieglstein
Publisher: Springer Science & Business Media
ISBN: 3642760848
Category : Medical
Languages : en
Pages : 375
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Book Description
Glaucoma Society of the International Congress of Ophthalmology, Bali, March 1990
Author: Sagarika Patyal
Publisher: Springer Nature
ISBN: 9811626014
Category : Medical
Languages : en
Pages : 185
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Book Description
This book covers interpretation of visual fields by Humphrey and Octopus perimeters and discussion of Humphrey visual fields in a variety of ocular disorders.It examines dilemmas faced by an ophthalmologist while evaluating visual fields which do not match with the clinical picture. Glaucoma, the commonest condition for visual field investigation is discussed in detail. Logical reasoningfor incorporating perimetry in glaucoma management with a clear understanding of the challenges in its interpretation is delved into. The book progresses to advanced glaucoma and glaucoma progression. It discusses a systematic evaluation of various parts of the visual field so that the reader can make a calculated management plan for their patient. Each chapter attempts to clearly enunciate factors that help in the diagnosis and features which may be confused with other conditions. Fields which help diagnosing early, advanced glaucoma and glaucoma progression with images and methods of ensuring reasonable diagnostic accuracy are included. The book incorporates separate chapters on ocular conditions which also mimic visual field defects of glaucoma with detailed modes of correct diagnosis, diagnostic dilemmas arising from retinal, macular, vascular, visual pathway lesions mimicking visual field defects of glaucoma or while coexisting with glaucoma, supported by algorithms to achieve a quick diagnosis in a busy OPD without missing the clinical findings and by using minimal investigative modalities. This book helps clinicians to prevent over diagnosis or under diagnosis of glaucoma and helps diagnose cases with morbidities causing visual field defects.
