Nate H, Susami K, Shibuya T, Mihashi T, Honda T, 2002, "Accommodation responses in observation of pan-focus stereoscopic images" Perception 31 ECVP Abstract Supplement
Accommodation responses in observation of pan-focus stereoscopic images
H Nate, K Susami, T Shibuya, T Mihashi, T Honda
When observing pan-focus stereoscopic images, eye accommodation might focus to the distance of vergence without mismatch between accommodation and vergence, since the focal depth of the pan-focus image is too deep. Our object in this study was to examine how stereoscopic image position guides eye accommodation. Deep focal depth condition (D) such as pan-focus, and shallow focal depth condition (S) were set as stereopsis focal depths. The target was an aerial image with an image plane made to float in space by means of an optical system. Real image condition (R) and old stereoscopic image condition (O) were compared with conditions D and S, respectively. Under conditions D, S, and O, the image plane was set 100 cm from the subject's eyes. Subjects observed radial-pattern targets for 3 s set at four distances from the subject's eyes by binocular disparity. Under conditions D and R, the accommodation distance was shorter as the target position approached the subjects. Under conditions S and O, the accommodation distance did not change even though the target position was close to the subjects. These results indicate that accommodation is guided to the target position by vergence induced by binocular disparity in the observation of pan-focus stereoscopic images.
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