Download or read book Extending the Reach of Anterior Segment Ophthalmic Imaging written by Shantanu Sanjay Sinha and published by . This book was released on 2016 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eye exams via a slit lamp are critical in screening for conditions such as cataracts, corneal opacities and pterygia early on to avert vision loss. The slit lamp, however, is a purely qualitative optical device that is bulky, expensive, can cause eye discomfort due to light sensitivity. It also requires a trained physician to operate, making it unsuitable for large-scale screening in resource-constrained settings. In this thesis, we propose a spectrum of portable anterior segment imaging solutions that can be operated by minimally trained health workers. On one end, we present a smartphone attachment with minimal optics and no electronic components beyond what is present in the smartphone itself to examine and image the anterior segment of the eye. This cost-effective, easily scalable solution would help extend the reach of anterior segment examination to extremely resource constrained settings, such as mass-screening camps, mobile ophthalmology clinics, war zones etc. On the other end, we propose purely solid-state instrumentation that employs programmable illumination and light steering optics to simulate the motion of a slit on the eye, thereby exhibiting functionality similar to that of a slit lamp with no moving parts. Finally, we discuss potential deployment strategies for two implementations of this technology in the specific cases of two contrasting healthcare systems in India.
Download or read book Anterior Segment Optical Coherence Tomography written by Roger F. Steinert and published by SLACK Incorporated. This book was released on 2008 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-speed anterior segment optical coherence tomography (OCT) offers a non-contact method for high resolution cross-sectional and three-dimensional imaging of the cornea and the anterior segment of the eye. As the first text completely devoted to this topic, Anterior Segment Optical Coherence Tomography comprehensively explains both the scientific principles and the clinical applications of this exciting and advancing technology. Anterior Segment Optical Coherence Tomography enhances surgical planning and postoperative care for a variety of anterior segment applications by expertly explaining how abnormalities in the anterior chamber angle, cornea, iris, and lens can be identified and evaluated using the Visante OCT(TM). Inside Anterior Segment Optical Coherence Tomography, Dr. Roger Steinert and Dr. David Huang, along with 22 of the field's leading professionals, provide a wealth of useful clinical and physiological material about this new diagnostic imaging technique. Valuable images are included to assist in the pre- and postoperative assessment of various anterior segment disorders. Additionally, this unique resource contains detailed information on biometric measurements to enhance diagnostic capability. On the leading edge of anterior segment imaging: Mapping of corneal thickness and keratoconus evaluation Measurement of LASIK flap and stromal bed thickness Visualization and measurement of anterior chamber angle and diagnosis of narrow angle glaucoma Measuring the dimensions of the anterior chamber and assessing the fit of intraocular lens implants Visualizing and measuring the results of corneal implants and lamellar procedures Imaging through corneal opacity to see internal eye structures With the increase in popularity of anterior chamber imaging, and anterior segment OCT proving to be the best tool for high resolution biometry, Anterior Segment Optical Coherence Tomography is a must-have for anterior segment, refractive, cornea, and glaucoma surgeons.
Download or read book In Vitro 3D Anterior Segment Imaging in Lamb Eye with Extended Depth Range Swept Source Optical Coherence Tomography written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlas of Anterior Segment Optical Coherence Tomography written by Jorge L. Alió and published by Springer Nature. This book was released on 2020-10-31 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of the Essentials in Ophthalmology series, this atlas is designed to comprehensively cover optical coherence tomography of the anterior segment of the eye. The aim is to improve knowledge of the fundamentals of OCT technology for anterior segment, clarify the differences with posterior segment OCT and emphasize the immense relevance and usefulness that anterior segment OCT study has for diagnosis, therapeutic orientation, surgical guidance, and improvement in patient management. Atlas of Anterior Segment Optical Coherence Tomography is organized into comprehensive chapters on the following topics: fundamentals, technologies and technological differences among platforms, application of OCT, corneal OCT angiography, as well as case-based chapters. Numerous highly-detailed figures, illustrations and photographs make this an ideal resource for the corneal specialist seeking further instruction on this cutting-edge technology. The case-based chapters include such conditions as bowman dystrophies, trauma, cataract, glaucoma, sclera, refractive surgery, ocular infections, and are structured to facilitate the consultant surgeon by providing practical information applicable to practical cases in their practice.
Download or read book Clinical Atlas of Anterior Segment OCT Optical Coherence Tomography written by Brett Levinson and published by Elsevier Health Sciences. This book was released on 2024-02-10 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: While eye care providers are thoroughly familiar with the use of optical coherence tomography (OCT) in the diagnosis and management of glaucoma and retinal diseases, many are not as familiar with its myriad uses for the diagnosis of corneal and anterior segment conditions. Anterior segment OCT (AS-OCT) can help to differentiate between various corneal pathologies, show the anatomy of the angles, obtain information about the lens-capsule complex, and guide contact lens fitting, among many other clinical uses. Clinical Atlas of Anterior Segment OCT expertly guides clinicians through all aspects of AS-OCT with hundreds of high-quality OCT images that highlight the utility of AS-OCT in diagnosing and managing a wide spectrum of anterior segment diseases. Covers the entire normal anatomy of the anterior segment and pathology of the conjunctiva, corneal epithelium, stroma and endothelium, lens, iris, anatomic angle, and clinical settings such as trauma, infection, inflammation, and contact lens fitting. Includes information on using AS-OCT in clinical and surgical settings (intraoperative AS-OCT). Provides rich visual guidance with over 500+ high-quality figures (anterior segment OCT imaging and clinical photos) comparing normal anatomy and a wide range of pathology, including both common and rare disorders and how to differentiate frequently confused conditions. Provides a well-rounded perspective of AS-OCT, including how to use, understand, and capture images. Links high-quality slit lamp images to the corresponding AS-OCT image with clear labels to show the pathology side by side. Features clinical pearls in each chapter to relate key AS-OCT and clinical findings to everyday practice.
Download or read book High Resolution Imaging in Microscopy and Ophthalmology written by Josef F. Bille and published by Springer. This book was released on 2019-08-13 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book provides a comprehensive overview of the application of the newest laser and microscope/ophthalmoscope technology in the field of high resolution imaging in microscopy and ophthalmology. Starting by describing High-Resolution 3D Light Microscopy with STED and RESOLFT, the book goes on to cover retinal and anterior segment imaging and image-guided treatment and also discusses the development of adaptive optics in vision science and ophthalmology. Using an interdisciplinary approach, the reader will learn about the latest developments and most up to date technology in the field and how these translate to a medical setting. High Resolution Imaging in Microscopy and Ophthalmology – New Frontiers in Biomedical Optics has been written by leading experts in the field and offers insights on engineering, biology, and medicine, thus being a valuable addition for scientists, engineers, and clinicians with technical and medical interest who would like to understand the equipment, the applications and the medical/biological background. Lastly, this book is dedicated to the memory of Dr. Gerhard Zinser, co-founder of Heidelberg Engineering GmbH, a scientist, a husband, a brother, a colleague, and a friend.
Download or read book Anterior Posterior Segment OCT Current Technology Future Applications written by Ashok Garg and published by JP Medical Ltd. This book was released on 2014-01-30 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical coherence tomography (OCT) is a non-invasive imaging test that uses light waves to take cross-section pictures of the retina, the light-sensitive tissue lining the back of the eye (geteyesmart.org). Anterior segment OCT covers structures in front of the vitreous humour – iris, cornea, lens and ciliary body. Posterior segment OCT includes the anterior hyaloid membrane and all the structures behind it – vitreous humour, retina, choroid and optic nerve. This book is a comprehensive guide to the use of OCT in anterior and posterior segment surgery. Beginning with an introduction to the technique, the following chapters examine OCT for numerous different procedures including for corneal disorders, glaucoma, diabetic retinopathy, keratoconus and refractive surgery. The accompanying interactive DVD ROM demonstrates intraoperative use of OCT for different surgical procedures. Key points Comprehensive guide to OCT in anterior and posterior segment surgery Covers numerous procedures for different parts of the eye Interactive DVD ROM demonstrates intraoperative use of OCT Includes nearly 270 clinical photographs, diagrams and tables
Download or read book Principles of Ocular Imaging written by Daniel Gologorsky and published by Slack. This book was released on 2020 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide for the eye specialist, Principles of Ocular Imaging presents essential information on imaging modalities for ophthalmologists, residents, and fellows. Ophthalmology and imaging are inextricably intertwined, and practicing eye care professionals need a single definitive source on multiple imaging modalities to reference in clinical practice. Together with their contributors, Drs. Gologorsky and Rosen provide concise but thorough information on the technology and clinical application of 22 imaging modalities unique to ophthalmology, with illustrations and photos throughout that demonstrate how to apply each imaging principle in clinical practice. Principles of Ocular Imaging is divided into the following subspecialties for easy reference in busy clinical environments: Oculoplastics: external photography, ptosis visual fields, slit lamp photography, and orbital ultrasonography Cornea and refractive: corneal topography, confocal microscopy, anterior segment optical coherence tomography (AS-OCT), ultrasound biomicroscopy (UBM), biometry for intraocular lens (IOL) calculations Glaucoma: visual fields, optical coherence tomography (OCT) in glaucoma Retina: fundus photography, fluorescein angiography (FA), indocyanine green (ICG) angiography, fundus autofluorescence (FAF), OCT in retina, optical coherence tomography angiography (OCTA), adaptive optics (AO), microperimetry, retinal ultrasonography Neuro-Ophthalmology: electrophysiology of vision and computed tomography (CT) & magnetic resonance imaging (MRI) A practical, illustrative guide to ophthalmic imaging, Principles of Ocular Imaging is an indispensable addition to the practicing ophthalmologist's professional library.
Download or read book Anterior Segment Imaging in Ophthalmology written by and published by Jaypee Brothers Publishers. This book was released on 2008 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Medical Imaging Systems written by Andreas Maier and published by Springer. This book was released on 2018-08-02 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book gives a complete and comprehensive introduction to the fields of medical imaging systems, as designed for a broad range of applications. The authors of the book first explain the foundations of system theory and image processing, before highlighting several modalities in a dedicated chapter. The initial focus is on modalities that are closely related to traditional camera systems such as endoscopy and microscopy. This is followed by more complex image formation processes: magnetic resonance imaging, X-ray projection imaging, computed tomography, X-ray phase-contrast imaging, nuclear imaging, ultrasound, and optical coherence tomography.
Download or read book Imaging the Eye from Front to Back with RTVue Fourier domain Optical Coherence Tomography written by David Huang and published by SLACK Incorporated. This book was released on 2010 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fourier-Domain optical coherence tomography (OCT) is the latest technology available to provide high-speed, high-resolution imaging of the cornea, anterior chamber angle, macula, and optic nerve head. It is uniquely suited for ophthalmologists that treat diseases from the front to the back of the eye. Inside Imaging the Eye from Front to Back with RTVue Fourier-Domain Optical Coherence Tomography, Drs. David Huang, Jay S. Duker, James G. Fujimoto, Bruno Lumbroso, Joel S. Schuman, and Robert N. Weinreb cover up-to-date OCT technology and diagnostic software of the RTVue. It is the first book that covers clinical applications from the front to the back of the eye, as opposed to concentrating either on posterior segment imaging or anterior segment imaging. Inside you'll find: * Explanation of Fourier-Domain OCT technology * Teaching of scan pattern selection * Step-by-step instruction for scan acquisition * Teaching of the interpretations of OCT images and measurements by many case examples * Interpretation of en face images Some chapters covered: * Anterior segment * Cornea * Posterior segment * Retina * Age-related macular degeneration * Diabetic retinopathy * Glaucoma Imaging the Eye from Front to Back with RTVue Fourier-Domain Optical Coherence Tomography is the must-have book for general ophthalmologists, glaucoma specialists, retina specialists, cornea specialists, and refractive surgeons, as well as biomedical engineers.
Download or read book High resolution Anterior Segment Optical Coherence Tomography and Ophthalmic Applications written by Rahul Yadav and published by . This book was released on 2012 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Despite advances in optical coherence tomography (OCT) there is still demand for further improvements in axial and lateral resolution, imaging depth and speed. The objectives of this dissertation were to develop advanced OCT systems that overcome some of the current limitations of this technique and to advance our understanding of the mechanism of human accommodation and corneal diseases by imaging the anterior segment of the eye. A large scan depth OCT (imaging depth > 10 mm) was developed for improving our understanding of accommodation. Novel scanning optics, where scanning beams are incident normal to the four ocular surfaces (anterior and posterior cornea and lens surface) was used in the system, to maximize the OCT signal. In-vivo imaging was carried out in two young normal subjects and the four anterior segment ocular surfaces could be visualized. Six millimeter diameter posterior lens surface could be imaged without the need for pupil dilation. Reduction in anterior chamber depth, increase in lens thickness and decrease in radius of curvature in both lenticular surfaces was observed with accommodation. An ultrahigh axial resolution OCT was developed to quantify structural changes in corneal diseases. The system, based on spectral domain OCT principle, used a broadband supercontinuum light source (375 nm at center wavelength of 812.5 nm) and was assembled in free space to avoid image degradation due to dispersion. A spectrometer based on modified Czerny Turner configuration was used to achieve relatively large scan depth (~1 mm). The experimentally measured axial resolution of the system was 1.1 [mu]m in corneal tissue, which allowed for the visualization and quantification of individual corneal layers in normal and diseased corneas. The clinical viability of the system was proven through a study on structural changes in the epithelium and Bowman's layer of keratoconic eyes. In-vivo cellular imaging capability, using an optical coherence microscope, was demonstrated by imaging stromal keratocytes and endothelial cells in the mouse cornea. The system provided large working distance (30.5 mm) and also has the potential of achieving larger field if imaging speed could be improved. Thus creating the possibility of performing non-invasive follow up investigation on the cellular structure in the mouse eyes. These advanced OCT systems have successfully overcome the limitations of currently available OCT systems, by providing better axial and lateral resolution and imaging depth. With improved performance these systems can help us in understanding the diseases pertaining to the anterior segment of the eye"--Pages ix-x.
Download or read book Imaging and Visualization in Ophthalmology written by Elizabeth J. Rossin and published by . This book was released on 2019 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Glaucoma Book written by Paul N. Schacknow and published by Springer Science & Business Media. This book was released on 2010-06-10 with total page 1019 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complete evidence-based medical and surgical management of glaucoma for both the general ophthalmologist in practice and residents The only book that covers the new generation of glaucoma procedures including trabectome, trabecular bypass and canaloplasty, by the experts who developed them Includes the latest laser treatments for glaucoma including micro diode and titanium saphire trabeculoplasty as well as laser from an external approach The most comprehensive coverage of the optic nerve and the importance of nerve fiber layer hemorrhage Provides an integrated approach to neovascular glaucoma merging treatment to the retina, with the use of new anti-VEGF drugs, tubes, and shunts to achieve the best outcome Integrates clinical science with basic science to outline the next steps in glaucoma therapy
Download or read book Handbook of Visual Optics Volume Two written by Pablo Artal and published by CRC Press. This book was released on 2017-02-24 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Visual Optics offers an authoritative overview of encyclopedic knowledge in the field of physiological optics. It builds from fundamental concepts to the science and technology of instruments and practical procedures of vision correction, integrating expert knowledge from physics, medicine, biology, psychology, and engineering. The chapters comprehensively cover all aspects of modern study and practice, from optical principles and optics of the eye and retina to novel ophthalmic tools for imaging and visual testing, devices and techniques for visual correction, and the relationship between ocular optics and visual perception.
Download or read book The Development and Clinical Application of Innovative Optical Ophthalmic Imaging Techniques written by Peng Xiao and published by Frontiers Media SA. This book was released on 2022-12-06 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Visual Optics Two Volume Set written by Pablo Artal and published by CRC Press. This book was released on 2017-06-27 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Visual Optics offers an authoritative overview of encyclopedic knowledge in the field of physiological optics. It builds from fundamental concepts to the science and technology of instruments and practical procedures of vision correction, integrating expert knowledge from physics, medicine, biology, psychology, and engineering. The chapters comprehensively cover all aspects of modern study and practice, from optical principles and optics of the eye and retina to novel ophthalmic tools for imaging and visual testing, devices and techniques for visual correction, and the relationship between ocular optics and visual perception.
