Microgravity And Vision Impairments In Astronauts

Author : Erik Seedhouse
Publisher : Springer
ISBN 13 : 3319178709
Total Pages : 96 pages
Book Rating : 4.07/5 ( download)

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Download or read book Microgravity and Vision Impairments in Astronauts written by Erik Seedhouse and published by Springer. This book was released on 2015-09-08 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent missions on board the International Space Station have revealed previously unreported physiological consequences of long duration space flight, particularly in eyesight, and in this Brief Dr. Seedhouse reviews the existing theories on what causes this degeneration and how long it will last. Notably, 60% of long-duration crews have reported subjective degradation in vision, a clear indication that further study is necessary before astronauts embark on even longer-term space missions. Decreased near-visual acuity was reported in 46% of ISS/Mir crewmembers, resulting in a change of up to 2 dioptres in their refractive correction. It is possible that ophthalmic changes have been present since the first days of spaceflight, but had been attributed to other causes; this approach to the issue as well as other hypotheses are all presented in full to give a broad foundation of the existing knowledge on the topic. The changes have occurred at various times during a mission with varying degrees of visual degradation. Some cases resolved on return to Earth, but several crewmembers have not regained pre-flight visual acuity, indicating the damage may be permanent. One explanation of the syndrome has been attributed to hyperopic shift due to aging, but onboard analysis techniques, including visual acuity assessments, retinal imagery, and ultrasound examination of the eye, has led to the acceptance of a wider syndrome. In addition to vision changes, studies have reported flattening of the globe, swelling of the optic disc (papilledema), choroidal folds in the retina, swelling of the optic nerve sheath, and visual field defects. It is widely hypothesized that this spectrum of symptoms may be explained by an elevation of intracranial pressure (ICP). Establishing the provenance of this medical problem, monitoring its occurrence and resolving the symptoms for future long term space missions is a key challenge for space medicine. With this book, readers have an entry point for understanding the full scope of the problem and its possible origins.

Author : Brandon R. Macias
Publisher : World Scientific Publishing Company
ISBN 13 : 9789814667104
Total Pages : 291 pages
Book Rating : 4.02/5 ( download)

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Download or read book Intracranial Pressure and Its Effect on Vision in Space and on Earth written by Brandon R. Macias and published by World Scientific Publishing Company. This book was released on 2017 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid distribution during spaceflight and impact on brain and vision health is an emerging field of high-priority research in the NASA human space program. International Space Station astronauts have developed ocular refraction changes during prolonged spaceflight. Within this book, experts review current data related to fluid shifts during microgravity exposure and the impact of fluid shifts on astronaut health. This work also compares current astronaut health problems with Earth-based health conditions such as elevated intracranial pressure and glaucoma. Chapters include discussion of altered fluid distribution, including intracellular and extracellular fluid shifts, eye morphology and vision disturbances, and intraocular pressure. In addition, chapters will include a discussion of advanced non-invasive technologies to investigate the abovementioned fluid volume and pressure variables. As such, the book aims to bridge health professionals, researchers, and science professionals by a presentation of ophthalmology topics critical to future human space exploration, thus providing new perspectives to solve emerging brain and eye disease on Earth and in Space.

Author : Alan R. Hargens
Publisher :
ISBN 13 : 9789814667111
Total Pages : 298 pages
Book Rating : 4.10/5 ( download)

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Download or read book Intracranial Pressure and Its Effect on Vision in Space and on Earth written by Alan R. Hargens and published by . This book was released on 2017 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fluid distribution during spaceflight and impact on brain and vision health is an emerging field of high-priority research in the NASA human space program. International Space Station astronauts have developed ocular refraction changes during prolonged spaceflight. Within this book, experts review current data related to fluid shifts during microgravity exposure and the impact of fluid shifts on astronaut health.This work also compares current astronaut health problems with Earth-based health conditions such as elevated intracranial pressure and glaucoma. Chapters include discussion of altered fluid distribution, including intracellular and extracellular fluid shifts, eye morphology and vision disturbances, and intraocular pressure. In addition, chapters will include a discussion of advanced non-invasive technologies to investigate the abovementioned fluid volume and pressure variables.As such, the book aims to bridge health professionals, researchers, and science professionals by a presentation of ophthalmology topics critical to future human space exploration, thus providing new perspectives to solve emerging brain and eye disease on Earth and in Space"--

Author : Brandon R Macias
Publisher : World Scientific
ISBN 13 : 9814667129
Total Pages : 300 pages
Book Rating : 4.28/5 ( download)

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Download or read book Intracranial Pressure And Its Effect On Vision In Space And On Earth: Vision Impairment In Space written by Brandon R Macias and published by World Scientific. This book was released on 2017-06-03 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid distribution during spaceflight and impact on brain and vision health is an emerging field of high-priority research in the NASA human space program. International Space Station astronauts have developed ocular refraction changes during prolonged spaceflight. Within this book, experts review current data related to fluid shifts during microgravity exposure and the impact of fluid shifts on astronaut health. This work also compares current astronaut health problems with Earth-based health conditions such as elevated intracranial pressure and glaucoma. Chapters include discussion of altered fluid distribution, including intracellular and extracellular fluid shifts, eye morphology and vision disturbances, and intraocular pressure. In addition, chapters will include a discussion of advanced non-invasive technologies to investigate the abovementioned fluid volume and pressure variables. As such, the book aims to bridge health professionals, researchers, and science professionals by a presentation of ophthalmology topics critical to future human space exploration, thus providing new perspectives to solve emerging brain and eye disease on Earth and in Space.

Author : Institute of Medicine
Publisher : National Academies Press
ISBN 13 : 0309170311
Total Pages : 317 pages
Book Rating : 4.14/5 ( download)

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Download or read book Safe Passage written by Institute of Medicine and published by National Academies Press. This book was released on 2001-11-20 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safe Passage: Astronaut Care for Exploration Missions sets forth a vision for space medicine as it applies to deep space voyage. As space missions increase in duration from months to years and extend well beyond Earth's orbit, so will the attendant risks of working in these extreme and isolated environmental conditions. Hazards to astronaut health range from greater radiation exposure and loss of bone and muscle density to intensified psychological stress from living with others in a confined space. Going beyond the body of biomedical research, the report examines existing space medicine clinical and behavioral research and health care data and the policies attendant to them. It describes why not enough is known today about the dangers of prolonged travel to enable humans to venture into deep space in a safe and sane manner. The report makes a number of recommendations concerning NASA's structure for clinical and behavioral research, on the need for a comprehensive astronaut health care system and on an approach to communicating health and safety risks to astronauts, their families, and the public.

Author : Thais Russomano
Publisher : BoD – Books on Demand
ISBN 13 : 1789232201
Total Pages : 298 pages
Book Rating : 4.02/5 ( download)

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Download or read book Into Space written by Thais Russomano and published by BoD – Books on Demand. This book was released on 2018-05-30 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our anatomy and physiology have been completely shaped by Earth's gravity. All body systems function in synergy with this unseen force. Yet, as we journey further and longer into space, our bodies must conform to a new reality, wherein gravity is absent or reduced, cosmic radiation threatens and our social and familial connections become distant. Into Space: A Journey of How Humans Adapt and Live in Microgravity gives an overview of some of the physiological, anatomical and cellular changes that occur in space and their effects on different body systems, such as the cardiovascular and musculoskeletal, and touches on cultural and psychosocial aspects of leaving behind family and the safety of Earth. It further addresses the complexity of manned space flights, showing how interdisciplinary this subject is and discussing the challenges that space physiologists, physicians and scientists must face as humans seek to conquer the final frontier.

Author : Melpo Christofidou-Solomidou
Publisher : MDPI
ISBN 13 : 3038429031
Total Pages : 191 pages
Book Rating : 4.36/5 ( download)

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Download or read book Oxidative Stress and Space Biology An Organ-Based Approach written by Melpo Christofidou-Solomidou and published by MDPI. This book was released on 2018-05-04 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Oxidative Stress and Space Biology: An Organ-Based Approach" that was published in IJMS

Author : Erik Seedhouse
Publisher : Springer Nature
ISBN 13 : 3031556046
Total Pages : 241 pages
Book Rating : 4.43/5 ( download)

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Download or read book Commercial Astronauts written by Erik Seedhouse and published by Springer Nature. This book was released on with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Andrew G. Lee
Publisher : Academic Press
ISBN 13 : 0323915256
Total Pages : 242 pages
Book Rating : 4.50/5 ( download)

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Download or read book Spaceflight Associated Neuro-Ocular Syndrome written by Andrew G. Lee and published by Academic Press. This book was released on 2022-07-16 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prolonged microgravity exposure during long-duration spaceflight (LDSF) produces unusual physiologic and pathologic neuro-ophthalmic findings in astronauts. These microgravity-associated findings collectively define the Spaceflight Associated Neuro-ocular Syndrome (SANS). In this book, the editors compare and contrast prior published work on SANS by the National Aeronautics and Space Administration’s (NASA) Space Medicine Operations Division with retrospective and prospective studies from other research groups. The book describes the possible mechanisms and potential etiologies for SANS, and provides an update and review on the clinical manifestations of SANS including: unilateral and bilateral optic disc edema, globe flattening, choroidal and retinal folds, hyperopic refractive error shifts, and focal areas of ischemic retina (i.e., cotton wool spots). The ocular imaging findings (e.g., retinal nerve fiber layer, optic disc, and choroidal changes on optical coherence tomography) of SANS is also described, including the intraorbital and intracranial findings on orbital ultrasound and magnetic resonance imaging. The knowledge gaps for in-flight and terrestrial human research including potential countermeasures for future stud is also explored, including reports on the in-flight and terrestrial human and animal research being investigated by NASA and its partners to study SANS both prospectively and longitudinally and in preparation for future long duration manned missions to space including the moon, the asteroid belt, or Mars. We think this is a unique topic and hope that NASA and its research partners continue to study SANS in preparation for future longer duration manned space missions. Written in an easy-to-read manner, the book adopts a translational approach and explores the science and the clinical manifestations of Space flight associated neuro-ocular syndrome. It is also multi-disciplinary and suitable for both clinicians and researchers in ophthalmology, neurology, and aerospace medicine interested in SANS SANS is a unique space flight disorder that has no terrestrial equivalent. The book involves contributions from international experts across multiple disciplines to tackle the problem of SANS Summarizes and reviews the current findings of SANS, including possible mechanisms and potential etiologies, clinical manifestations, current reports on the in-flight and terrestrial human and animal research, and ocular imaging findings

Author : Ningli Wang
Publisher : Springer Nature
ISBN 13 : 9811378967
Total Pages : 254 pages
Book Rating : 4.66/5 ( download)

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Download or read book Integrative Ophthalmology written by Ningli Wang and published by Springer Nature. This book was released on 2019-09-05 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the development of nature science and industrial technology, more and more patients are benefitting from the rapid progress in ophthalmology, as the use of new medicine and delicate surgical therapy has ensured them the chance to restore their sight. However, some problems have come up during its development, of which the most serious one is the limitation of the ophthalmology. Eyes are not isolated organs, they are connected to our body, and thus, the general status of our body will affect the eyes’ function. Therefore, it is of great importance that the ophthalmologists see the big picture while dealing with the clinical problems. Based on the above observations, we put forward the concept of Integrative Ophthalmology, and describe the ophthalmology related medical situations that are prone to be neglected in clinical practice in a bid to increase the awareness of doctors from all fields that a holistic view should be adopted in clinical practice, and it is the patients that we are treating rather than the disease. There are 9 parts in the book, containing the concept of integrative ophthalmology, intraocular and intracranial pressure gradient related diseases,and the relationship between the different general status and eye disorders. We do believe that the integrative ophthalmology is the key to the development of ophthalmology and hope readers can benefit from this book.