We provide a subjective and objective evaluation of the viewability of high-definition images. First, we examined the preferred viewing distance for images of different sizes, including monoscopic and stereoscopic ones. Second, we measured the eye movements of participants on comparing the preferred with the non-preferred viewing distance. The results indicate two points. First, for larger images (greater than 70 in.), including either stereoscopic or monoscopic images, the preferred viewing distance is 2.0 to 2.5 times the absolute display height. Second, eye movement may determine a person's preferred viewing distances. These results could provide a guideline for the design of the visual environment, including larger, stereoscopic display systems with high-definition.
