摘要: A simple statement of the Peripheral Vision Horizon Device (PVHD) theory is that the likelihood of pilot disorientation in flight can be much reduced by providing a new kind of artificial horizon that will provide orientation info... 展开 A simple statement of the Peripheral Vision Horizon Device (PVHD) theory is that the likelihood of pilot disorientation in flight can be much reduced by providing a new kind of artificial horizon that will provide orientation information to peripheral vision. In considering the validity of this theory, three questions which are crucial are discussed: (1) Why was the artificial horizon chosen, instead of some other flight instrument. (2) Why is peripheral vision used instead of foveal vision. (3) Is there convincing evidence that peripheral vision is particularly well suited to the processing of orientation information. 收起