J.E. Bos | M.A. Hogervorst Resultaten van en aanpassingen aan een dynamische visustest
Gedrukt boek
Previous studies showed that assessment of the dynamic visual acuity is of value in testing pilots, and how such a test could be performed. It was, however, not known how this test would work in practice and which parameter settings would yield significant acuity reductions. We applied the flash-test to four subjects using the TNO 3D rotation chair with a CRT screen mounted on it in an extensive series of experiments. For the moving stimuli a reduction in acuity was measured. With self motion, however, no reduction was obtained. The passive self motion used therefore is insufficient to measure dynamic acuity. An active auto rotation test seems the best alternative. The effect of ambient light and background characteristics seems negligible in all conditions. Our findings can be used to reduce the test battery considerably. In the next stage the tests should be applied to a group of aviators (or comparable subjects) as well as to patients with known visual and vestibular deficits to determine the sensitivity and specificity of the test.