抄録
In previous paper, the coefficients of anisotropy for total field of vision were culculated and using that coefficients, functions which represents an anisotropic visual coordinate system were obtained. This anisotropic system were based upon the data of Exp. IIIA which had been carried out for right eyes of right-handed observers. In this paper, Exp. IIIB was carried out to investigate how the above mentioned anisotropy changes with each side of the eye, individuals, and right-handedness. The apparatus and the method are almost the same to Exp. IIIA, and a observer adjusts PSE for 3 directions by one eye against the standard stimulus which is shown at 30°in lower side of the point of fixation. As for the results, first, for the right-handed observrs, differences among each level of the above mentioned factor are all highly significant. And estimation of means and their confidence bands of PSE under combined conditions are shown, together with variance estimations due to individual differences and due to difference limen. Second, phenomena of underestimation of extent in the right side field with the right eye for the right-handed observers is found out it is named the phenomena of retinal right-handedness. Third, the same analysis is shown for the 12 left-handed observers. Further, invesigation for the data of 24 observers, it is sugested that perceptual asymmetry on visual field is related to hemisphere and cross of visual nerves.
