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Author: Jeffrey W. Kiel Publisher: Biota Publishing ISBN: 1615041699 Category : Medical Languages : en Pages : 83
Book Description
This presentation describes the unique anatomy and physiology of the vascular beds that serve the eye. The needs for an unobstructed light path from the cornea to the retina and a relatively fixed corneal curvature and distance between refractive structures pose significant challenges for the vasculature to provide nutrients and remove metabolic waste. To meet these needs, the ocular vascular beds are confined to the periphery of the posterior two thirds of the eye and a surrogate circulation provides a continuous flow of aqueous humor to nourish the avascular cornea, lens and vitreous compartment. The production of aqueous humor (and its ease of egress from the eye) also generates the intraocular pressure (IOP), which maintains the shape of the eye. However, the IOP also exerts a compressing force on the ocular blood vessels that is higher than elsewhere in the body. This is particularly true for the intraocular veins, which must have a pressure higher than IOP to remain patent, and so the IOP is the effective venous pressure for the intraocular vascular beds. Consequently, the ocular circulation operates at a lower perfusion pressure gradient than elsewhere in the body and is more at risk for ischemic damage when faced with low arterial pressure, particularly if IOP is elevated. This risk and the specialized tissues of the eye give rise to the fascinating physiology of the ocular circulations.
Author: Jeffrey W. Kiel Publisher: Biota Publishing ISBN: 1615041699 Category : Medical Languages : en Pages : 83
Book Description
This presentation describes the unique anatomy and physiology of the vascular beds that serve the eye. The needs for an unobstructed light path from the cornea to the retina and a relatively fixed corneal curvature and distance between refractive structures pose significant challenges for the vasculature to provide nutrients and remove metabolic waste. To meet these needs, the ocular vascular beds are confined to the periphery of the posterior two thirds of the eye and a surrogate circulation provides a continuous flow of aqueous humor to nourish the avascular cornea, lens and vitreous compartment. The production of aqueous humor (and its ease of egress from the eye) also generates the intraocular pressure (IOP), which maintains the shape of the eye. However, the IOP also exerts a compressing force on the ocular blood vessels that is higher than elsewhere in the body. This is particularly true for the intraocular veins, which must have a pressure higher than IOP to remain patent, and so the IOP is the effective venous pressure for the intraocular vascular beds. Consequently, the ocular circulation operates at a lower perfusion pressure gradient than elsewhere in the body and is more at risk for ischemic damage when faced with low arterial pressure, particularly if IOP is elevated. This risk and the specialized tissues of the eye give rise to the fascinating physiology of the ocular circulations.
Author: Robert N. Weinreb Publisher: Kugler Publications ISBN: 9062992226 Category : Glaucoma Languages : en Pages : 177
Book Description
This is the sixth World Glaucoma Association Consensus. The relationship between ocular blood flow and glaucoma has been discussed for more than a century, and still it uniformly fuels debates at glaucoma meetings throughout the world. Clearly, the results of this report will have broad and significant impact on glaucoma research and clinical practice. The global faculty, consisting of leading authorities on the scientific and clinical aspects of ocular blood flow, have met in Fort Lauderdale on May 2, 2009 to discuss the reports and refine the consensus statements.
Author: Alon Harris Publisher: Butterworth-Heinemann ISBN: 9781437717372 Category : Blood flow Languages : en Pages : 0
Book Description
In the second edition of Atlas of Ocular Blood Flow, Dr. Alon Harris details the vascular anatomy and physiology of the eye, analyzes the eye's blood supply, and evaluates the latest technologies available for assessing patients. He shows you how irregular ocular blood flow patterns can indicate systemic or medication-related conditions, and presents images and actual case reports to illustrate the use of new technologies such as OCT with Doppler application and non-invasive retinal oximetry. With more than 400 illustrations, most in full color, this is the only atlas worldwide that gives you pictorial presentations, anatomical illustrations, and detailed descriptions of the methods available to measure blood flow. Gain a clear understanding of the anatomy/physiology of the blood supply to and within the eye to help make more effective clinical decisions. Analyze the potential effects of blood flow changes in various eye illnesses to see how they are influenced by diseases like glaucoma and age-related macular degeneration. Rely on the extensive experience of the authors in implementing new technologies to better access ocular circulation. Diagnose ocular, systemic, or medication-related conditions in patients by measuring their ocular blood flow. Master the newest techniques and glimpse new technologies that will be available for assessing ocular blood flow in the future. Visualize anatomy, techniques, and imaging findings with more than 400 illustrations.
Author: Josef F. Bille Publisher: Springer ISBN: 3030166384 Category : Medical Languages : en Pages : 411
Book Description
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.
Author: Jay Chhablani Publisher: Academic Press ISBN: 0128092238 Category : Science Languages : en Pages : 474
Book Description
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
Author: Giovanna Guidoboni Publisher: Springer Nature ISBN: 3030258866 Category : Mathematics Languages : en Pages : 606
Book Description
The chapters in this contributed volume showcase current theoretical approaches in the modeling of ocular fluid dynamics in health and disease. By including chapters written by experts from a variety of fields, this volume will help foster a genuinely collaborative spirit between clinical and research scientists. It vividly illustrates the advantages of clinical and experimental methods, data-driven modeling, and physically-based modeling, while also detailing the limitations of each approach. Blood, aqueous humor, vitreous humor, tear film, and cerebrospinal fluid each have a section dedicated to their anatomy and physiology, pathological conditions, imaging techniques, and mathematical modeling. Because each fluid receives a thorough analysis from experts in their respective fields, this volume stands out among the existing ophthalmology literature. Ocular Fluid Dynamics is ideal for current and future graduate students in applied mathematics and ophthalmology who wish to explore the field by investigating open questions, experimental technologies, and mathematical models. It will also be a valuable resource for researchers in mathematics, engineering, physics, computer science, chemistry, ophthalmology, and more.
Author: Myron Yanoff Publisher: ISBN: Category : Medical Languages : en Pages : 792
Book Description
The new, 5th Edition of the premier ocular pathology resource offers the latest information in the field. Over 2095 illustrations *1800 in full color* from the authors' collections represent one of the finest compilations of rare and unusual ocular conditions available. Comprehensive, yet concise, it explores new topics such as complications of corneal surgery, vascular disorders, secondary cataracts, bone-marrow transplant retinopathy, neural retinal detachment, ocular melanotic tumors, and more. Plus, a companion CD-ROM and text/CD-ROM package are available! Explores new topics such as complications of corneal surgery, vascular disorders, secondary cataracts, bone-marrow transplant retinopathy, neural retinal detachment, and ocular melanotic tumors (including diabetes). Offers expanded coverage of entities such as chromosome 17 deletion syndrome, necrobiotic xanthogranuloma, climatic protoglycan stromal keratopathy, unilateral acute idiopathic maculopathy, acute mutifocal retinitis, idiopathic polypoidal choroidal vasculopathy, North Carolina macular dystrophy, familial internal limiting membrane dystrophy, clumped pigmentary retinal dystrophy (clumped pigmentary retinal degeneration), vasoproliferative retinal tumors, Schwartz's syndrome, familial amyloidotic polyneuropathy, familial atypical mole and melanoma (FAM-M) syndrome, and more! Features specific genetic profiles for many existing entities.
Author: Sohan Singh Hayreh Publisher: Springer ISBN: 3319127810 Category : Medical Languages : en Pages : 863
Book Description
This book provides a comprehensive account of the pathogenesis, clinical features, and management of ocular vascular occlusive disorders, with the focus very much on the scientific evidence. This offers a sound basis for addressing the many controversies that surround these disorders, which collectively constitute the most common cause of visual impairment or blindness. The book is divided into two sections, the first of which addresses the basic science and encompasses vascular anatomy, blood supply and flow, and retinal tolerance time to acute ischemia. The second, clinical, section covers the presentation, clinical features, diagnosis, and treatment of the full range of vascular occlusive disorders of the retina, the choroid, the anterior segment of the eye, ophthalmic manifestations of carotid artery disease and the optic nerve. Ocular Vascular Occlusive Disorders, written by a distinguished world leader in the field, will be invaluable for general ophthalmologists, and particularly for retina specialists, neuro-ophthalmologists, and researchers.
Author: Ronald F. Tuma Publisher: Academic Press ISBN: 0080569935 Category : Science Languages : en Pages : 999
Book Description
This reference is a volume in the Handbook of Physiology, co-published with The American Physiological Society. Growth in knowledge about the microcirculation has been explosive with the field becoming fragmented into numerous subdisciplines and subspecialties. This volume pulls all of the critical information into one volume. - Meticulously edited and reviewed. Benefit: Provides investigators a unique tool to explore the significance of their findings in the context of other aspects of the microcirculation. In this way, the updated edition has a direct role in helping to develop new pathways of research and scholarship - Highlights the explosive growth in knowledge about the microcirculation including the biology of nitric oxide synthase (NOS), endothelial cell signaling, angiogenesis, cell adhesion molecules, lymphocyte trafficking, ion channels and receptors, and propagated vasomotor responses. Benefit: Microcirculatory biology has become fragmented into numerous sub-disciplines and subspecialties, and these reference reintegrates the information in one volume
Author: Jeffrey W. Kiel
Author: Jeffrey W. Kiel
Author: Robert N. Weinreb
Author: Alon Harris
Author: Josef F. Bille
Author: Jay Chhablani
Author: Giovanna Guidoboni
Author: Myron Yanoff
Author: Sohan Singh Hayreh
Author: Helga Kolb
Author: Ronald F. Tuma