The Contrast Sensitivity Function From Laboratory To Clinic
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The Contrast Sensitivity Function From Laboratory To Clinic
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Author : Fang Hou
language : en
Publisher: Frontiers Media SA
Release Date : 2021-12-30
The Contrast Sensitivity Function From Laboratory To Clinic written by Fang Hou and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-12-30 with Science categories.
Visual Impairments
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2002-08-17
Visual Impairments written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-08-17 with Social Science categories.
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.
Optics In Medicine Biology And Environmental Research
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Author : Gert Bally
language : en
Publisher: Elsevier Publishing Company
Release Date : 1993
Optics In Medicine Biology And Environmental Research written by Gert Bally and has been published by Elsevier Publishing Company this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Medical categories.
Comprises selected contributions to the Optics Within Life Sciences first conference. The first in the series, it is intended to serve the need for interdisciplinary information and communication in the domains of Optics Within Life Sciences.
Neurovision Neural Bases Of Binocular Vision And Coordination And Their Implications In Visual Training Programs
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Author : Olivier A. Coubard
language : en
Publisher: Frontiers Media SA
Release Date : 2015-10-12
Neurovision Neural Bases Of Binocular Vision And Coordination And Their Implications In Visual Training Programs written by Olivier A. Coubard and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-10-12 with Binocular vision categories.
Binocular vision is achieved by five neurovisual systems originating in the retina but varying in their destination within the brain. Two systems have been widely studied: the retino-tectal or retino-collicular route, which subserves an expedient and raw estimate of the visual scene through the magnocellular pathway, and the retino-occipital or retino-cortical route, which allows slower but refined analysis of the visual scene through the parvocellular pathway. But there also exist further neurovisual systems: the retino-hypothalamic, retino-pretectal, and accessory optic systems, which play a crucial role in vision though they are less understood. The retino-pretectal pathway projecting onto the pretectum is critical for the pupillary or photomotor reflex. The retino-hypothalamic pathway projecting onto the suprachiasmatic nucleus regulates numerous behavioral and biological functions as well as circadian rhythms. The accessory optic system targeting terminal lateral, medial and dorsal nuclei through the paraoptic fasciculus plays a role in head and gaze orientation as well as slow movements. Taken together, these neurovisual systems involve 60% of brain activity, thus highlighting the importance of vision in the functioning and regulation of the central nervous system. But vision is first and foremost action, which makes perception impossible without movement. Binocular coordination is a prerequisite for binocular fusion of the object of interest on the two foveas, thus ensuring visual perception. The retino-collicular pathway is sufficient to elicit reflexive eye movements with short latencies. Thanks to its motor neurons, the superior colliculus activates premotor neurons, which themselves activate motor neurons of the oculomotor, trochlear and abducens nuclei. At a higher level, a cascade of neural mechanisms participates in the control of decisional eye movements. The superior colliculus is controlled by the substancia nigra pars reticulata, which is itself gated by subcortical structures such as the dorsal striatum. The superior colliculus is also inhibited by the dorsolateral prefrontal cortex through a direct prefrontotectal tract. Cortical areas are crucial for the triggering of eye movements: the frontal eye field, supplementary eye field, and parietal eye field. Finally the cerebellum maintains accuracy. The focus of the present research topic, entitled Neural bases of binocular vision and coordination and their implications in visual training programs, is to review the most recent findings in brain imaging and neurophysiology of binocular vision and coordination in humans and animals with frontally-placed eyes. The emphasis is put on studies that enable transfer of knowledge toward visual training programs targeting visual field defects (e.g., hemianopia) and binocular functional disorders (e.g., amblyopia).
Assessment Of Biological Mechanisms Across The Life Span
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Author : Lisabeth F. DiLalla
language : en
Publisher: Psychology Press
Release Date : 2013-06-17
Assessment Of Biological Mechanisms Across The Life Span written by Lisabeth F. DiLalla and has been published by Psychology Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-17 with Psychology categories.
Based on the First Biannual Lifespan Development Conference, this volume offers a multidisciplinary and multidimensional approach to the study of lifespan development in the areas of neuropsychology, cognition, behavior genetics, and perception. The objective of the conference was to provide a lively forum for the discussion of issues related to lifespan development and to reflect on important topics challenging the field during the 1990s. The chapters in this book, motivated by the conference presentations, cover: * the assessment and evaluation of developmental changes in visual perception; * the contribution of behavioral genetic factors to development; * the predictability of perinatal risk factors as they relate to cognitive and linguistic outcomes; * the neuropsychological changes during aging; and * innovative approaches to the study of cognitive development using neuropsychological testing methods.
Annual Report
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Author : National Eye Institute
language : en
Publisher:
Release Date : 1984
Annual Report written by National Eye Institute and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Ophthalmology categories.
Clinical Procedures In Primary Eye Care E Book
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Author : David B. Elliott
language : en
Publisher: Elsevier Health Sciences
Release Date : 2020-01-30
Clinical Procedures In Primary Eye Care E Book written by David B. Elliott and has been published by Elsevier Health Sciences this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-30 with Medical categories.
Well organized and easy to read, Clinical Procedures in Primary Eye Care, 5th Edition, takes an accessible, step-by-step approach to describing the commonly used primary care procedures that facilitate accurate diagnosis and effective patient management. This practical, clinically-focused text offers succinct descriptions of today's most frequently encountered optometric techniques supported by research-based evidence. You'll find essential instructions for mastering the procedures you need to know, including recent technical advances in the field. - Discusses technical advances that are dramatically altering optometry: Optical Coherence Tomography (OCT) and ultra-wide field imaging (optomaps). - Presents outstanding new digital images of OCT cases and optomaps for a wide variety of conditions of the central and peripheral retina. - Focuses on evidence-based optometry; all procedures include a section that reviews when and how the procedure should be measured and uses clinical wisdom in addition to research-based evidence. - Presents new digital images of normal variations of the eye – crucial visual support for understanding what is normal and what is disease. - Helps you clearly visualize procedures and eye disorders through full-color photographs, diagrams, and video clips. - Provides fully revised print on dry eye assessment based on the latest international Dry Eye Workshop (DEWS) guidelines. - Features coverage of changes in the eye due to high myopia, and expounds the need for myopia control techniques. - Offers extensive material online to enhance learning: video clips, interactive testing sections, additional photographs, and more. - Expert ConsultTM eBook version included with purchase. This enhanced eBook experience allows you to search all of the text, figures, and references from the book on a variety of devices.
Development Of Order In The Visual System
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Author : S. Robert Hilfer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Development Of Order In The Visual System written by S. Robert Hilfer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The eye has fascinated scientists from the earliest days of biological in vestigation. The diversity of its parts and the precision of their interaction make it a favorite model system for a variety of developmental studies. The eye is a particularly valuable experimental system not only because its tissues provide examples of fundamental processes, but also because it is a prominent and easily accessible structure at very early embryonic ages. In order to provide an open forum for investigators working on all aspects of ocular development, a series of symposia on ocular and visual devel opment was initiated in 1973. A major objective of the symposia has been to foster communication between the basic research worker and the clinical community. It is our feeling that much can be learned on both sides from this interaction. The idea for an informal meeting allowing maximum ex change of ideas originated with Dr. Leon Candeub, who supplied the nec essary driving force that made the series a reality. Each symposium has concentrated on a different aspect of ocular development. Speakers have been selected to approach related topics from different perspectives.
Mayo Clinic Internal Medicine Board Review
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Author : Amit Ghosh, MD
language : en
Publisher: Oxford University Press, USA
Release Date : 2010-09-23
Mayo Clinic Internal Medicine Board Review written by Amit Ghosh, MD and has been published by Oxford University Press, USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-09-23 with Medical categories.
Written by experienced faculty at Mayo Clinic, The NINTH EDITION is a completely revised and updated study guide that has proved invaluable for the American Board of Internal Medicine certification or maintenance of certification examination as well as for general practice review by physicians around the world.
Catalogs Of Courses
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Author : University of California, Berkeley
language : en
Publisher:
Release Date : 1995
Catalogs Of Courses written by University of California, Berkeley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Includes general and summer catalogs issued between 1878/1879 and 1995/1997.