A study on visual characteristics of binocular 3-D images

To put the binocular 3-D image system into practical use, it is necessary to investigate the relationship between the system and human subjects in order to make an ergonomic evaluation of the system. In this study, a comparative analysis is made of the changes in the accommodation and pupil functions before and after observing binocular 3-D images as the visual distance varies. The results suggest that: (1) the discordance in the distance information on the accommodation and pupil functions when observing 3-D images is compensated by the miosis and altering the focal depth, (2) from the consideration of the effect of the visual distance condition on the visual functions, it is believed that the visual functions are stabilized at the dark focus in the sense that the changes in the contraction and relaxation after observing the 3-D images are minimized.