Papers published on the mechanism and the performance of the human visual system during these several years are reviewed following the process of the vision, and dynamic chara-cteristics of the visual response, such as the detection of the movement, are also surveyed.
Among various newly developed techniques, the psychological methods, that is, Stile's two color incremental threshold technique and Ikeda's summation index technique, as well as a microelectrode method, seem to be most powerfull means in analyzing the mechanism of visual phenomena, especially the color vision.
