The impact of long-term isolation on visual acuity

During the experiment with 90- and 7-day isolation and confinement tests were applied to evaluate, along with static, expositional and dynamic (DVA) visual acuity using automated system VZGLIAD (Gaze). Test distance was 1 meter. To assess DVA, the subjects were requested to make oscillatory movement...

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Bibliographic Details
Published inAviakosmicheskaia i Äkologicheskaia meditsina Vol. 31; no. 4; p. 41
Main Authors Bokhov, B B, Nosovskiĭ, A M
Format Journal Article
LanguageRussian
Published Russia (Federation) 1997
Subjects
Humans
Space Flight
Time Factors
Visual Acuity
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Summary:During the experiment with 90- and 7-day isolation and confinement tests were applied to evaluate, along with static, expositional and dynamic (DVA) visual acuity using automated system VZGLIAD (Gaze). Test distance was 1 meter. To assess DVA, the subjects were requested to make oscillatory movements with the head in the horizontal plane with a metronome frequency at 1 Hz. An upward trend in static visual acuity was interpreted as a result of myopization engendered by exposure to confinement and video display. A significant loss in expositional (and dynamic) visual acuity was stated in the main (p > 0.01) and visiting (p > 0.1) crews. These shifts could be associated with the dominance of inhibitory processes in the visual cortex due to monotony of the visual environment and insufficient oculomotor and accommodative activities.
ISSN:0233-528X