Contrast Sensitivity of the Human Eye and Its Effects on Image Quality
Contrast Sensitivity of the Human Eye and Its Effects on Image Quality

Author: Peter G. J. Barten

Publisher: SPIE Press

Published: 1999

Total Pages: 236

ISBN-13: 9780819434968

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This book examines the contrast sensitivity of the human visual system - concerning the eye's ability to distinguish objects from each other or from the background - and its effects on the imageforming process. The text provides equations for determining various aspects of contrast sensitivity, in addition to models that easily can be used for practical applications.

Glare and Contrast Sensitivity for Clinicians
Glare and Contrast Sensitivity for Clinicians

Author: M. Princeton Nadler

Publisher: Springer

Published: 1990

Total Pages: 202

ISBN-13:

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There have been greater advances in our knowledge of the visual function and its disabilities in the past 50 years than had accumulated in all of the previous years. This applies not only to the basic science of biochemistry, physiology, physiopathology, and cytopathology but also to the diagnosis and treatment of visual dysfunction and ocular disease. These advances have been aided by a proliferation of ingenious instruments. When I began my residency in ophthalmology at The Wilmer Institute in 1938, one was supposed to learn not only the physiology of vision but also how to diagnose and treat all phases of ophthalmology including disabilities of the orbit, sclera, retina, lens, and cornea. In addition he or she was supposed to understand neuro-ophthalmology, ophthalmic genetics, and so-called uveitis. It soon became evident that no one could adequately comprehend all of these areas and, therefore, most young trainees today take a year or two of fel lowship in a specialized area following their three-to five-year residency train ing. Following this they join a group of other ophthalmologists and specialize. Thus, they become more expert in the diagnosis and treatment in a limited area in ophthalmology. When I returned to The Wilmer Institute in 1955 as Head of the Department I was the only full-time member of the staff. To date we have some 28 full-time ophthalmologists working in highly specialized areas of our institution.

System for Ophthalmic Dispensing
System for Ophthalmic Dispensing

Author: Clifford W. Brooks

Publisher: Elsevier Health Sciences

Published: 2006-10-16

Total Pages: 689

ISBN-13: 0702038911

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The ultimate ophthalmic dispensing reference, this book provides a step-by-step system for properly fitting and adjusting eyewear. It covers every aspect of dispensing — from basic terminology to frame selection to eyewear fitting, adjusting, and repairing. Perfect for both students who are just learning about dispensing and practitioners who want to keep their skills up to date, this resource offers in-depth discussions of all types of lenses, including multifocal, progressive, absorptive, safety, recreational, aspheric, and high index. Plus, it goes beyond the basics to explore the "how" and "why" behind lens selection, to help you better understand and meet your patients' vision needs. - A glossary of key terms provides easy access to definitions. - Proficiency tests at the end of each chapter reinforce your understanding of the material through multiple-choice, fill-in-the-blank, matching, and true/false questions. - A new full-color design with hundreds of illustrations that clearly demonstrate key procedures, concepts, and techniques. - Updated coverage of the latest dispensing procedures and equipment. - Detailed information on the newest types of lenses, including progressive, absorptive, aspheric, and atoric. - Updated photos feature more current frames and lenses, keeping the book up to date with today's eye care trends.

Modern Ophthalmic Optics
Modern Ophthalmic Optics

Author: José Alonso

Publisher: Cambridge University Press

Published: 2019-04-11

Total Pages: 565

ISBN-13: 1108579833

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This book is a comprehensive account of the most recent developments in modern ophthalmic optics. It makes use of the powerful matrix formalism to describe curvature and power, providing a unified view of the optical and geometrical properties of lenses. This unified approach is applicable to the design and properties of not only spectacle lenses, but also contact and intraocular lenses (IOL). The newest developments in lens design, manufacturing and testing are discussed, with an emphasis on the description of free-form technology, which has surpassed traditional manufacturing methods and allows digital lenses to be specifically designed with the unique requirements of the user. Other important topics which are covered include modern lens materials, up-to-date lens measuring techniques, contact and intraocular lenses, progressive power lenses, low vision aids, ocular protection and coatings. Providing a broad overview of recent developments in the field, it is ideal for researchers, manufacturers and practitioners involved in ophthalmic optics.

Clinical Optics
Clinical Optics

Author: Troy E. Fannin

Publisher: Butterworth-Heinemann

Published: 2013-10-22

Total Pages: 480

ISBN-13: 1483192598

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Clinical Optics is intended primarily for use by optometry students, though it could also prove useful for the training of optometric technicians and dispensing opticians. This book is organized into thirteen chapters. These chapters cover most aspects of ophthalmic optics or clinical optics including the design and dispensing of eyewear, the types for lenses suitable for correcting high refractive errors, the optical principles governing low vision lenses and the importance of absorptive lenses and lens coatings for eye protection against radiation. This book will be of interest to optometry students and to those involved in the training of optometric technicians and dispensing opticians.

Guidelines for Cone Penetration Test
Guidelines for Cone Penetration Test

Author: United States. Federal Highway Administration. Implementation Division

Publisher:

Published: 1977

Total Pages: 164

ISBN-13:

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This manual presents procedures and guidelines applicable to the use of the cone penetration test. It represents the author's interpretation of the state-of-the-art in Dutch static cone testing as of February 1977. Its contents should provide assistance and uniformity to engineers concerned with the interpretation of the data obtained from such testing. Only geotechnical engineers familiar with the fundamentals of soil mechanics and foundation engineering should use this manual. The manual includes: Introduction and review of the general principals concerning cone penetrometer testing. Individual design chapters which address topics such as: pile design, shear strength estimation, settlement calculation and compaction control; and Appendices which present previously published, pertinent information on cone penetrometer testing.

Polymer Permeability
Polymer Permeability

Author: J. Comyn

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 387

ISBN-13: 9400948581

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Polymers are permeable, whilst ceramics, glasses and metals are gener ally impermeable. This may seem a disadvantage in that polymeric containers may allow loss or contamination of their contents and aggressive substances such as water will diffuse into polymeric struc tures such as adhesive joints or fibre-reinforced composites and cause weakening. However, in some cases permeability is an advantage, and one particular area where this is so is in the use of polymers in drug delivery systems. Also, without permeable polymers, we would not enjoy the wide range of dyed fabrics used in clothing and furnishing. The fundamental reason for the permeability of polymers is their relatively high level of molecular motion, a factor which also leads to their high levels of creep in comparison with ceramics, glasses and metals. The aim of this volume is to examine some timely applied aspects of polymer permeability. In the first chapter basic issues in the mathema tics of diffusion are introduced, and this is followed by two chapters where the fundamental aspects of diffusion in polymers are presented. The following chapters, then, each examine some area of applied science where permeability is a key issue. Each chapter is reasonably self-contained and intended to be informative without frequent outside reference. This inevitably leads to some repetition, but it is hoped that this is not excessive.

The Ophthalmic Assistant E-Book
The Ophthalmic Assistant E-Book

Author: Harold A. Stein

Publisher: Elsevier Health Sciences

Published: 2017-01-31

Total Pages: 929

ISBN-13: 0323394787

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Freeman, is your go-to resource for practical, up-to-date guidance on ocular diseases, surgical procedures, medications, and equipment, as well as paramedical procedures and office management in the ophthalmology, optometry, opticianry or eye care settings. Thoroughly updated content and more than 1,000 full-color illustrations cover all the knowledge and skills you need for your day-to-day duties as well as success on certification and recertification exams. This comprehensive text provides essential learning and practical guidance for ophthalmic assistants, technicians, medical technologists, physician assistants, and all others involved in ocular care, helping each become a valuable asset to the eye care team. Full-color visual guidance for identification of ophthalmic disorders, explanations of difficult concepts, and depictions of the newest equipment used in ophthalmology and optometry. Quick-reference appendices provide hospital/practice forms for more efficient patient record keeping, conversion tables, and numerous language translations, plus information on ocular emergencies, pharmaceuticals, and more. Updated throughout with the latest information on basic science, new testing procedures, new equipment, the role of the assistant in the practice, and an expanded chapter on OCT imaging. A new bonus color image atlas tests your clinical recognition of disease and disorders of the eye. Four brand-new chapters cover the latest industry advances regarding dry eye, vision function and impairment, uveitis, and surgical correction of presbyopia.