Cyclophoria and Pilot Prediction of the Runway Plane.
Final rept. Mar-Dec 78,
BOEING AEROSPACE CO SEATTLE WASH
Pagination or Media Count:
This investigation had two primary objectives 1 to determine the direction and magnitude of cyclophoria resting states in a sample of observers taken from a select population AF pilots 2 to determine whether the magnitude of cyclophoria found had the potential of affecting the pilots perception of the runway plane on final approach. The CircleBar test was administered to 12 pilots under 0, 5 and 10 degrees of instrument convergence. The increases in Convergence significantly increased the measured cyclophoria from .01 degrees encyclophoric to .65 and .82 degrees excyclophoric. A second, previously developed, test the ARC test was used to measure cyclophoria under conditions of a more complex and structured image than the CircleBar test. The ARC test was given with zero and or - two degrees of image cyclorotation, which corresponded to or - 114 arc seconds of induced disparity into the ARC test. Image cyclorotation produced significant effects in responses on the ARC test, with observed shifts, in the expected direction from the nonrotated condition of 13.5 and 13.6 arc seconds for two degrees excyclorotation and encyclorotation respectively. The magnitude of this shift is only about 12 percent of the induced disparity, a reflection of the interaction of the complex stimulus pattern.