[Investigation of the threshold characteristics of visual information perception by operator controlling the illumination parameters in the 105-day experiment in isolation].

The investigations of threshold frequency characteristics (TFC) of the visual analyzer and labor productivity were carried out during 105-d isolation of volunteers in an airtight module illuminated by LED lamps adjustable to personal psychophysiological needs. Software and calculation procedure were devised to assist the chromatic TFC-based determination of photometric parameters. Data of analysis of actual mood and vision contrast sensitivity when looking at a three-color image suggested that visual performance could be improved by achieving light color adequacy to TFC of individual vision. The results of experimental investigations showed once again efficiency of the proposed methods and their relevance to the objectives of the extended ground-based experiment simulating an exploration mission to Mars.

[Role of space-frequency characteristics of vision organ in the human psychophysiological state and performance].

Light conditions and color scheme of closed environments should be favorable to human performance. Space station lighting system should ensure visual comfort during work and be appropriate for crew health and well-being. To be successful in solving these problems, it is important to have objective data about luminosity and chromaticity distribution in closed environments. Experiments aimed to investigate the vision color space-frequency characteristic (SFC) were performed using a set of psychophysiological sensors. Contrast sensitivity of pre-adapted operators was determined by thresholds of perceiving object's advent and disappearance, as well as by tracking time and adaptation and test luminosity. Analysis of the experimental data made it evident that color contrast sensitivity and, therefore, SFC of the organ of vision are valuable markers of the interdependence between the visual information processing and psychophysiological status of human. Color SFC illustrates deviations and also enables their quantification. Changes in psychophysiological parameters bring about commensurate deviations in color SFC; consequently, SFC can be implemented in neuroinformation technologies of health recovery and light-and-color control of environment.