VISUAL ACUITY DURING VIBRATION AS A FUNCTION OF FREQUENCY, AMPLITUDE AND SUBJECT DISPLAY RELATIONSHIP.
Final rept. Jul 65-Jun 66,
CORNELL AERONAUTICAL LAB INC BUFFALO N Y
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Visual acuity during whole body Z-axis vibration while in a semi-supine position was measured as a function of frequency and amplitude of the input vibration, two restraint configurations with or without a bite-bar, and two subject-display relationships subject alone vibrating, and subject and display both vibrating. The results indicated an interaction between frequency of vibration and the restraint variable in their effects on visual acuity. Visual acuity suffered greater decrement with the bite-bar than without it, and the degree of this difference increased with increasing frequency. The effects of these variables were quite similar for both subject-display relationships. The report also describes the development of the method which was used to measure visual acuity. This is a vernier technique which makes use of a varying contrast ratio between the visual target and the background. Author
- Anatomy and Physiology