Study of Effects of Whole-Body Vibration on Visual Acuity

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Abstract
A new method of determination of visual acuity for studying biomechanical and physiological reaction of man on vertical whole-body vibration was used in several experiments. Visual acuity was ascertained by measuring the maximum distance of clear vision of black and white square field contours having a side of 1 mm and arranged in chessboard with total area of 1 cm2. This method allowed to measure among others the effects of the following vibration parameters and exposures on vision performance: vibration frequencies, acceleration levels, time duration and intermitnt exposures. In the short time exposures to vibration the visual acuity depended on both frequency and the magnitude vibration. In long time exposures lasting longer than 30 minutes the temporary threshold shift (TTS) of visual acuity was observed.