Perimetry Update 1998/1999
Perimetry Update 1998/1999

Author: Michael Wall

Publisher: Kugler Publications

Published: 1999

Total Pages: 576

ISBN-13: 9789062991556

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The topics presented at the XIIIth Symposium embraced all aspects of perimetric science. A total of ten sessions were held and covered: fundamentals of perimetry, visual psychophysics, new perimetric techniques, new algorithms for estimating threshold, perimetric variability, color perimetry, optic nerve head imaging, and visual field investigation in glaucoma and in retinal and neurological disorders. The new perimetric techniques included frequency doubling technology, flicker perimetry and pupil perimetry. The new algorithms included the Swedish Interactive Threshold Algorithm (SITA) and Tendency Orientated Perimetry (TOP). The session on perimetric variability addressed some of the issues contributing to short-term fluctuation, and also contained papers on the use of univariate linear regression of point-wise sensitivity against time to follow-up for the identification of progressive visual field loss. The session on color perimetry was almost exclusively concerned with Short Wavelength Automated Perimetry (SWAP), particularly in glaucoma and high risk ocular hypertension. However, one group described a seemingly promising additional use for SWAP; namely, in the detection of diabetic macular edema. The presentations within the imaging session described the latest morphometric and topographic parameters derived by optic nerve head and nerve fiber layer analysis, and compared these structural measures with those of the functional assessment.

Visual Impairments
Visual Impairments

Author: National Research Council

Publisher: National Academies Press

Published: 2002-08-17

Total Pages: 369

ISBN-13: 0309083486

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When children and adults apply for disability benefits and claim that a visual impairment has limited their ability to function, the U.S. Social Security Administration (SSA) is required to determine their eligibility. To ensure that these determinations are made fairly and consistently, SSA has developed criteria for eligibility and a process for assessing each claimant against the criteria. Visual Impairments: Determining Eligibility for Social Security Benefits examines SSA's methods of determining disability for people with visual impairments, recommends changes that could be made now to improve the process and the outcomes, and identifies research needed to develop improved methods for the future. The report assesses tests of visual function, including visual acuity and visual fields whether visual impairments could be measured directly through visual task performance or other means of assessing disability. These other means include job analysis databases, which include information on the importance of vision to job tasks or skills, and measures of health-related quality of life, which take a person-centered approach to assessing visual function testing of infants and children, which differs in important ways from standard adult tests.

Resolving Dilemmas in Perimetry
Resolving Dilemmas in Perimetry

Author: Sagarika Patyal

Publisher: Springer Nature

Published: 2021-07-22

Total Pages: 185

ISBN-13: 9811626014

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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.

The Field Analyzer Primer: Excellent Perimetry
The Field Analyzer Primer: Excellent Perimetry

Author: Anders Heijl

Publisher:

Published: 2021-05-22

Total Pages:

ISBN-13: 9780988479517

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Concise introduction and reference that may be used by busy practitioners and in training programs as a practical guide for clinical automated perimetry and particularly visual field testing using the Humphrey perimeter.

Visual Impairment in Children due to Damage to the Brain
Visual Impairment in Children due to Damage to the Brain

Author: Gordon Dutton

Publisher: John Wiley & Sons

Published: 2010-09-14

Total Pages: 369

ISBN-13: 1898683867

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Clinics in Developmental Medicine No.186 The increased awareness of cerebral visual impairment in children, combined with improved recognition of its wide ranging manifestations, has led to its recognition as the most common cause of visual impairment in children in the developed world. Yet the subject is in its infancy, with very little published to date. Information on this complex topic has been needed by all disciplines working with disabled children for many years. This ambitious book links the work of authors from many of the major research teams in this field, who have made significant contributions to the literature on the subject of cerebral visual impairment and provide a structured amalgam of the viewpoints of different specialists. The book contains some very novel concepts, which will be of great practical value to those who care for children with visual impairment due to brain injury. Summaries of the more specialist chapters as well as clear diagrams and a glossary have been provided to increase the book’s accessibility to a broader readership. This is an exciting and important field, to which this book makes a major contribution.