| abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: To make it possible to change an optotype or a voice corresponding to a display position of the optotype. SOLUTION: An image corresponding to a predetermined optotype is displayed on a display panel built in a display unit 1, and a joystick 12 is displayed. When you move the optotypes displayed on the display panel by operating the, the type of optotypes corresponding to the presentation angle of the optotypes, The size or color changes, or the speakers 5a and 5 The volume or tone color of the voice output from b changes, and a virtual realistic sound field corresponding to the display position of the visual target is formed, or the tone color of the voice output from the speakers 5a and 5b changes. . |