Contrast Sensitivity and Ocular Microtremor: A Model Study of Gravity Effects on Visual Perception

Contrast Sensitivity and Ocular Microtremor: A Model Study of Gravity Effects on Visual Perception Full article

Journal

Human Physiology
ISSN: 1608-3164 , E-ISSN: 0362-1197

Output data

Year: 2023, Volume: 49, Number: 7, Pages: 800-806 Pages count : 7 DOI: 10.1134/s0362119723070150

Tags

contrast sensitivity, ocular microtremor, dry immersion, microgravity, weightlessness, adaptation, readaptation

Authors

Shoshina I.I. ¹ , Kotova D.A. ¹ , Zelenskaya I.S. ² , Lyapunov S.I. ³ , Lyapunov I.S. ³ , Bekreneva M.P. ² , Tomilovskaya E.S. ²

Affiliations

1	St. Petersburg State University, St. Petersburg, Russia
2	Institute of Biomedical Problems, Russian Academy of Sciences, Moscow, Russia
3	Prokhorov Institute of General Physics, Russian Academy of Sciences, Moscow, Russia

An assessment was made of visual contrast sensitivity and tremor micromovements of the eyes under conditions of “dry” immersion (DI), which simulates the physiological effects of weightlessness in the human body. Visual contrast sensitivity and ocular microtremor were evaluated in 10 human subjects (mean age 30.8 ± 4.6 years) during dry immersion (DI) as a model of the physiological effects of microgravity. Con trast sensitivity was assessed by visocontrastmetry upon presentation of Gabor patches with spatial frequen cies of 0.4, 1.0, 3.0, 6.0, and 10.0 cycles per degree (cpd). The amplitude and frequency of ocular microtremor were measured using a high-frequency optical tweezer. Measurements were performed a day prior to DI; on DI days 1, 3, 5, and 7; and on the next day after DI completion. Contrast sensitivity was found to be altered within both low and high spatial frequencies; ocular microtremor amplitudes changed within a wide range. At this point in time, the findings are a step forward in searching for a method to objectively assess the func tion of the central nervous system in a changed environment

Shoshina I.I. , Kotova D.A. , Zelenskaya I.S. , Lyapunov S.I. , Lyapunov I.S. , Bekreneva M.P. , Tomilovskaya E.S.
Contrast Sensitivity and Ocular Microtremor: A Model Study of Gravity Effects on Visual Perception
Human Physiology. 2023. V.49. N7. P.800-806. DOI: 10.1134/s0362119723070150 Scopus РИНЦ OpenAlex

Submitted:

Aug 8, 2022

Scopus:	2-s2.0-85183632821
Elibrary:	64553497
OpenAlex:	W4391251787

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