Accommodation, Nearwork, and Myopia

Accommodation, Nearwork, and Myopia PDF

Author: Editha Ong

Publisher: Optometric Extension Program Foundation

Published: 1997

Total Pages: 211

ISBN-13: 9780943599885

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Comprehensive discussion of the research and theoretical modeling behind the long-standing question about the relationship between the accommodative/convergence systems, their primary function in nearwork, and possible etiologies of myopia. Provides a review of the various components of accommodation. This review, an update on the status of current research on the neurophysiology, including the neuro pharmacology of accommodation, is followed by a complete discussion of the various components of accommodation and the relationship to various refractive groups. Core to the book is a thorough discussion of nearwork-induced myopia, presenting a balanced discussion of the various theoretical models of myopia.

Myopia and Nearwork

Myopia and Nearwork PDF

Author: Mark Rosenfield

Publisher: Butterworth-Heinemann Medical

Published: 1998

Total Pages: 220

ISBN-13: 9780750637848

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This book combines theory, practice and research into the field in one complete volume.

Emergent Techniques for Assessment of Visual Performance

Emergent Techniques for Assessment of Visual Performance PDF

Author: National Research Council

Publisher: National Academies Press

Published: 1985-01-01

Total Pages: 75

ISBN-13:

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Recent vision research has led to the emergence of new techniques that offer exciting potential for a more complete assessment of vision in clinical, industrial, and military settings. Emergent Techniques for Assessment of Visual Performance examines four areas of vision testing that offer potential for improved assessment of visual capability including: contrast sensitivity function, dark-focus of accommodation, dynamic visual acuity and dynamic depth tracking, and ambient and focal vision. In contrast to studies of accepted practices, this report focuses on emerging techniques that could help determine whether people have the vision necessary to do their jobs. In addition to examining some of these emerging techniques, the report identifies their usefulness in predicting performance on other visual and visual-motor tasks, and makes recommendations for future research. Emergent Techniques for Assessment of Visual Performance provides summary recommendations for research that will have significant value and policy implications for the next 5 to 10 years. The content and conclusions of this report can serve as a useful resource for those responsible for screening industrial and military visual function.

Updates on Myopia

Updates on Myopia PDF

Author: Tien Y Wong

Publisher:

Published: 2020-10-08

Total Pages: 310

ISBN-13: 9781013274091

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This book is open access under a CC BY 4.0 license. This open access book discusses basic clinical concepts of myopia, prevention of progression and surgical treatments for myopia and pathological myopia. It also summarises the latest evidence and best practices for managing myopia, high myopia and its complications. Written by leading experts, the book addresses clinical diagnosis and interpretation of imaging modalities, and various complications of myopia such as glaucoma, choroidal neovascularization, retinal degeneration and cataracts. It is a valuable comprehensive resource for general and sub-specialist ophthalmologists as well as residents and ophthalmologists in training.; This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.

Structural and Functional Aspects of Myopia in Young Adults

Structural and Functional Aspects of Myopia in Young Adults PDF

Author: Alison Alderson

Publisher:

Published: 2011

Total Pages:

ISBN-13:

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This thesis has investigated nearwork-induced transient myopia and accommodation responses in relation to refractive stability, multichromatic stimuli and orthokeratology. Five individual studies have been carried out. Initially an investigation into the temporal and dioptric aspects of nearwork-induced transient myopia was undertaken, suggesting that increased task duration does not increase the level, or slow the regression of post-task NITM, however an increase in the dioptric demand of the task does. In the second study, a longitudinal myopia progression study, these findings were related to short term myopia progression. The third investigation demonstrates the feasibility of measuring the biometric correlates of nearwork-induced transient myopia using a low coherence reflectometry device (LenStar, Haag Streit Koeniz, Switzerland). Fourthly, a comparison of the differences between static and dynamic accommodative responses, microfluctuations and nearwork-induced transient myopia produced when viewing a black/white target as oppose to a red/blue target has suggested the possibility of four accommodative responses to this multichromatic stimulus. Further investigation will be necessary to investigate if any of these response types are related to myopia progression. 2 The final study investigates the effect of two different designs of orthokeratology contact lenses (C5 and polynomial) on visual function. It appears to be the case that although the polynomial lens design has a larger refractive effect than the C5 lens it reduces both high and low contrast corrected visual acuity to a greater extent. The higher the baseline mean spherical equivalent refractive error the larger the detrimental effect.

Models of the Visual System

Models of the Visual System PDF

Author: George K. Hung

Publisher: Springer Science & Business Media

Published: 2013-11-11

Total Pages: 777

ISBN-13: 1475758650

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Some of the best vision scientists in the world in their respective fields have contributed to chapters in this book. They have expertise in a wide variety of fields, including bioengineering, basic and clinical visual science, medicine, neurophysiology, optometry, and psychology. Their combined efforts have resulted in a high quality book that covers modeling and quantitative analysis of optical, neurosensory, oculomotor, perceptual and clinical systems. It includes only those techniques and models that have such fundamentally strong physiological, control system, and perceptual bases that they will serve as foundations for models and analysis techniques in the future. The book is aimed first towards seniors and beginning graduate students in biomedical engineering, neurophysiology, optometry, and psychology, who will gain a broad understanding of quantitative analysis of the visual system. In addition, it has sufficient depth in each area to be useful as an updated reference and tutorial for graduate and post-doctoral students, as well as general vision scientists.

Pathologic Myopia

Pathologic Myopia PDF

Author: Richard F. Spaide

Publisher: Springer Nature

Published: 2021-07-28

Total Pages: 461

ISBN-13: 3030743349

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Pathologic Myopia is a major cause of severe vision loss worldwide. The mechanisms for vision loss include cataract, glaucoma, retinal detachment, and above all, myopic maculopathy within the posterior staphyloma. The first edition of Pathologic Myopia is one of the only current books to specifically address this disease and discusses recent developments in imaging technologies and various approaches to treatments, such as laser photocoagulation, photodynamic therapy, pharmaco-therapeutic injections in the vitreous, and surgery. This new edition is a timely update to the standard reference in the field, with new chapters on advanced refractive error correction, genetics, developing a classification system, and special surgical approaches for pathologic myopia. Complete with even more high-quality color images and informative tables, this book is written and edited by leaders in the field and is geared towards ophthalmologists, including residents and fellows in training, glaucoma and cataract specialists, and vitreoretinal macula experts.

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