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Accommodation Nearwork And Myopia
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Book Synopsis Myopia and Nearwork by : Mark Rosenfield
Download or read book Myopia and Nearwork written by Mark Rosenfield and published by Butterworth-Heinemann Medical. This book was released on 1998 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book combines theory, practice and research into the field in one complete volume.
Book Synopsis Accommodation, Nearwork, and Myopia by : Editha Ong
Download or read book Accommodation, Nearwork, and Myopia written by Editha Ong and published by Optometric Extension Program Foundation. This book was released on 1997 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Webvision written by Helga Kolb and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Emergent Techniques for Assessment of Visual Performance by : National Research Council
Download or read book Emergent Techniques for Assessment of Visual Performance written by National Research Council and published by National Academies Press. This book was released on 1985-01-01 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Updates on Myopia written by Tien Y Wong and published by . This book was released on 2020-10-08 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Nearwork-induced Transient Myopia (NITM) Follwing Marked and Sustained, But Interrupted, Accommodation at Near by :
Download or read book Nearwork-induced Transient Myopia (NITM) Follwing Marked and Sustained, But Interrupted, Accommodation at Near written by and published by . This book was released on 2010 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural and Functional Aspects of Myopia in Young Adults by : Alison Alderson
Download or read book Structural and Functional Aspects of Myopia in Young Adults written by Alison Alderson and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Pathologic Myopia by : Richard F. Spaide
Download or read book Pathologic Myopia written by Richard F. Spaide and published by Springer Nature. This book was released on 2021-07-28 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Models of the Visual System by : George K. Hung
Download or read book Models of the Visual System written by George K. Hung and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 777 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Neuro-Ophthalmology by : Matthew J. Thurtell MD
Download or read book Neuro-Ophthalmology written by Matthew J. Thurtell MD and published by Oxford University Press. This book was released on 2016-09-01 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of the "What Do I Do Now?" series, Neuro-Ophthalmology uses a case-based approach to cover common and important topics in the examination, investigation, and management of afferent visual, efferent eye movement, eyelid, pupil, and orbital disorders. Each chapter provides a discussion of the diagnosis, key points to remember, and selected references for further reading. For this new edition, all cases and references have been updated and new cases have been added, including neuroretinitis, autosomal dominant optic atrophy, carotid-cavernous fistula, and more. Neuro-Ophthalmology is an engaging collection of thought-provoking cases which clinicians can utilize when they encounter difficult patients. The volume is also a self-assessment tool that tests the reader's ability to answer the question, "What do I do now?"
Book Synopsis Borish's Clinical Refraction - E-Book by : William J. Benjamin
Download or read book Borish's Clinical Refraction - E-Book written by William J. Benjamin and published by Elsevier Health Sciences. This book was released on 2006-10-13 with total page 2711 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now updated and expanded to cover the latest technologies, this full-color text on clinical refraction uses an easy-to-read format to give optometry students and practitioners all the important information they need. Also covers a wide range of other aspects of the eye exam, including anterior and posterior segment evaluations, contact lens, ocular pharmacology, and visual field analysis. Four new chapters cover wavefront-guided refraction, optical correction with refractive surgeries, prosthetic devices, and patients with ocular pathology. - Offer precise, step-by-step how-to's for performing all of the most effective refractive techniques. - Presents individualized refractive approaches for the full range of patients, including special patient populations. - Contriubtors are internationally recognized, leading authorities in the field. - New full-color design with full-color images throughout. - Completely updated and expanded to include current technologies. - A new chapter on Optical Correction with Refractive Surgeries, including keratoplasty, traditional refractive surgeries (e.g. LASIK and PRK), crystalline lens extraction with and without pseudophakia, the new presbyopic surgery, etc. - A new chapter on Wavefront Guided Refraction provides information on the advantages and limitations the Hartmann-Shack Method for objective refraction plus aberrometry and the refraction and the use of in the correction of the eye with spectacles, contact lenses, and refractive surgery. - A new chapter on Patients with Ocular Pathology reflects the most current knowledge of patients with ocular pathologies. - Provides information on Optical Correction with Prosthetic Devices, including corneal onlays, stromal implants, phakic intraocular lenses, etc. - Includes new chapters and/or discussions on such topics as: Aberrations of the Eye, Refractive Consequences of Eye Pathology, Diagnosis and Treatment of Dry Eye, Diagnosis of Pathology of the Anterior Segment, Diagnosis of Glaucoma, and Diagnosis of Pathology of the Posterior Segment. - Visual Acuity chapter expanded to include the effect of refractive error on visual acuity and statistics on how much of a change in visual acuity is significant. - Objective Refraction, Corneal Topography, and Visual Field Analysis chapters include the addition of new electro-optical and computer techniques and equipment. - Chapters on Multifocal Spectacle Lenses and Contact Lenses now cover newer progressive addition lenses and contact lenses that are now on the market. - Electrodiagnosis chapter revised to take a more clinical approach.
Book Synopsis Choroidal Disorders by : Jay Chhablani
Download or read book Choroidal Disorders written by Jay Chhablani and published by Academic Press. This book was released on 2017-05-31 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Choroidal Disorders provides an overview on various chorioretinal disorders with a special emphasis on choroidal imaging. As our understanding of the choroid has significantly improved with the development of advanced optical coherence tomography (OCT) and its role in posterior segment diseases is gaining new significance, this book focuses on the related improvements, diagnostic capabilities, management and prognosis of various chorioretinal disorders. It covers conventional techniques, such as ultrasonography and indocyanine green angiography as well as the most advanced techniques, including enhanced depth imaging OCT, swept source OCT, and OCT angiography. Concise overview of various chorioretinal disorders, with special emphasis on choroidal imaging Written for practitioners and researchers in sensory systems (vision), ophthalmologists, and retina specialists Covers the most advanced imaging techniques in choroidal disorders, such as enhanced depth imaging OCT, swept source OCT, and OCT angiography
Book Synopsis Clinical Management of Binocular Vision by : Mitchell Scheiman
Download or read book Clinical Management of Binocular Vision written by Mitchell Scheiman and published by Lippincott Williams & Wilkins. This book was released on 2008 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: This basic text covers the evaluation, diagnosis, and treatment of the most prevalent vision disorders in a clinical optometrist's or ophthalmologist's practice. Coverage includes the most common non-strabismic binocular vision disorders, including accommodative and eye movement disorders as well as amblyopia. Coverage of each diagnostic category includes background information, symptoms, case analysis, and management options. Case studies appear at the end of each chapter. This edition includes three new chapters on primary care of binocular vision, accommodative and eye movement disorders; myopia control; and binocular vision problems associated with refractive surgery. The thoroughly revised chapters on vision therapy procedures and instrumentation describe the latest equipment and computer software. The chapters on advanced diagnostic and management issues have been updated with the latest research.
Book Synopsis Spherical Aberration, Accommodation and Myopia by : Janice Tarrant
Download or read book Spherical Aberration, Accommodation and Myopia written by Janice Tarrant and published by . This book was released on 2010 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Myopia is a condition in which the eye grows too long to match its optical focal length and represents a failure in both structure and function. Because of the potential risks of vision loss associated with high myopia, and also with corrective treatments such as refractive surgery and occasionally also with contact lenses, myopia should not be considered a benign condition. The hypothesis that hyperopic defocus from under-accommodation during near work is the driving stimulus in the progression of myopia, motivated studies of bifocal spectacles and progressive addition lenses, as optical treatments for the control of myopia progression, with limited success. In contrast, multifocal (MF) soft contact lenses (SCL) and orthokeratology (ortho-k) have proven to be more beneficial although the mechanisms underlying their anti-myopia effects are not understood. This dissertation, which describes 4 main studies, represents efforts to understand how spherical aberration influences the accommodative response and examines as an explanation for the myopia control effects of MF SCLs and ortho-k the possibility that induced changes in ocular spherical aberration decreases the lag of accommodation. First the effects of bifocal (BF) SCLs on the accommodative responses of young adult emmetropes and myopes were measured using a refractometer. Interpretation of these results proved to be problematic because direct measurements could not be made through the BF SCLs necessitating an assumption to be made about the effective add provided by the lenses. To address the above issues, in a follow-up study MF SCLs were used in conjunction with a wavefront sensor, allowing direct measurements of accommodative responses through the lenses. To analyze the collected data, the problem of determining a suitable method for calculating accommodative responses from wavefront aberrations had to be solved. Thus a second complementary study evaluated some of the methods used to calculate objective refractions from wavefront aberrations. The best results were obtained with a through-focus procedure, which used an optical quality metric to determine the best image plane and then calculated the accommodative error relative to this plane. The latter findings enabled a comprehensive analysis of the accommodative response data obtained in the MF SCL study, which demonstrated that spherical aberration and pupil diameter independently influence the accommodative response. Both center-distance and center-near MF lenses produced myopic shifts in the best image plane, the former by adding positive spherical aberration and the latter with the added power of the near addition. For pupils larger than approximately 5 mm, both MF lenses resulted in increased accommodative responses determined by a neural sharpness metric compared with those for a single vision distance lens. A fourth study measured the change in ocular aberrations induced by ortho-k and assessed the long term effect of ortho-k on the accommodative response of young adult myopes. This study found that ortho-k had similar effects to the center-distance MF SCL on aberrations and accommodative responses. An intriguing long-term outcome of this treatment was a dramatic increase in pupil size for all tested vergences. Explanations in terms of changes in both the pupillary light and near reflexes were considered. In summary, the studies reported in this dissertation point to complex interactions between spherical aberration, pupil size and the accommodative response, which may be deliberately manipulated in designing novel optical treatments for the control of myopia progression.
Download or read book Myopia Manual written by Klaus Schmid and published by . This book was released on 2004-06 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unbiased summary of the literature about myopia, some ideas about linkages between the various published results, and recommendations for shortsighted people and people who don't want to become shortsighted at all.
Book Synopsis The Pediatric Eye Exam Quick Reference Guide: Office and Emergency Room Procedures by : Zhu-Tam, Lily
Download or read book The Pediatric Eye Exam Quick Reference Guide: Office and Emergency Room Procedures written by Zhu-Tam, Lily and published by IGI Global. This book was released on 2022-02-18 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a need for comprehensive books that provide crucial information in a clear and direct manner, particularly in the medical field. Currently, there are limited resources available to students and clinicians that provide step-by-step procedures with pictures on how to examine the eye in the pediatric population. The Pediatric Eye Exam Quick Reference Guide: Office and Emergency Room Procedures is a clinical procedure book to provide step-by-step pediatric eye care examination techniques and is an important addition to the field of eye care. The chapters are written by leading pediatric optometrists and ophthalmologists in the field. Years of academic and clinical experiences from schools of optometry, hospital-based eye care, and private practice are all presented in a user-friendly format with clinical pearls and insights that will help any clinician perform a pediatric eye exam easily and efficiently. Covering a range of critical topics such as pupil examination, visual field testing, refraction, and ocular emergencies and providing pictures, it is ideal for all students, residents, academicians, trainers, and novel and seasoned clinicians who are interested in learning how to examine a pediatric patient and staying on top of the latest pediatric eye care procedures.
Book Synopsis Clinical Management of Binocular Vision by : Mitchell Scheiman
Download or read book Clinical Management of Binocular Vision written by Mitchell Scheiman and published by Lippincott Williams & Wilkins. This book was released on 2013-09-05 with total page 1114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fourth edition of Clinical Management of Binocular Vision uses the past five years of research studies and literature to provide an accurate look at today’s diagnosis and treatment of binocular vision. Written with an emphasis on proper evaluation, diagnosis, and treatment, each condition is covered in-depth and includes background information, symptoms, case analysis, and management options. This edition also includes the latest information on new vision therapy equipment. Easy to read and understand, this book is ideal for faculty when designing courses, students studying these topics for the first time, or established practitioners looking for a practical, easy-to-use reference on accommodative, ocular motility, and nonstrabismic vision anomalies.
