Insights into spaceflight-associated neuro-ocular syndrome with review of intraocular and orbital findings.
| Autor: | Milner DC; Sue Anschutz-Rodgers University of Colorado Eye Center and Department of Ophthalmology., Subramanian PS; Sue Anschutz-Rodgers University of Colorado Eye Center and Department of Ophthalmology.; Department of Neurology.; Department of Neurosurgery, University of Colorado School of Medicine, Aurora, Colorado.; Department of Surgery (Division of Ophthalmology), Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Current opinion in ophthalmology [Curr Opin Ophthalmol] 2023 Nov 01; Vol. 34 (6), pp. 493-499. Date of Electronic Publication: 2023 Aug 30. |
| DOI: | 10.1097/ICU.0000000000001000 |
| Abstrakt: | Purpose of Review: Spaceflight-associated neuro-ocular syndrome (SANS) remains a phenomenological term, and advances in ophthalmic imaging as well as new insights from ground-based experiments have given support to new theories of how SANS develops and what may be done to counter it. Recent Findings: SANS has been postulated to arise from elevated intracranial pressure (ICP) during long-duration spaceflight (LDSF). However, recent work has shown that acute microgravity exposure does not increase ICP, and the effect of cephalad fluid shifts on ICP in microgravity remain unknown. In addition, structural imaging of the retina and optic nerve show changes after LDSF that are distinct from findings in terrestrial patients with elevated ICP. Since astronauts have not reported symptoms that would be expected with chronic ICP elevation, new theories that orbital and/or intracranial venous pressure may be the primary contributors to the development of SANS. Summary: Research has been filling knowledge gaps that exist regarding the cause(s) of SANS, and these advances are crucial steps in the effort to design countermeasures that will be required before human deep space exploration missions can be undertaken. (Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.) |
| Databáze: | MEDLINE |
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