Abstract: A measuring method for measuring rotation characteristics of an eyeball of a subject includes: showing display information on a display screen, at a position separated from a reference position, the display screen being shown in front of the eyeball of the subject by a display device that is secured to a head of the subject, the reference position being where a front line of sight of the eyeball of the subject who looks forward straightly, crosses the display screen; changing a direction of a line of sight from the eyeball to the display information by switching the display information to other contents while changing a displayed position of the display information; and judging whether the subject can recognize the contents of the display information at the changed position, to measure the rotation characteristics of the eyeball.

Abstract: A binocular visual function measurement method including a visual target presentation step of a right eye image viewed by the right eye of a measurement subject and a left eye image viewed by the left eye of the measurement subject to the measurement subject on a single portable display screen; a presentation control step of changing positions where the right eye image and the left eye image are presented, relative to each other; a timing detection step of detecting a timing at which the measurement subject is unable to fuse the right eye image and the left eye image when the presentation positions are changed; and a parameter value calculation step of calculating a predetermined parameter value regarding a binocular visual function of the measurement subject based on a relationship between the relative positions of the right eye image and the left eye image when the timing is detected.

Abstract: A measuring method for measuring rotation characteristics of an eyeball of a subject includes: showing display information on a display screen, at a position separated from a reference position, the display screen being shown in front of the eyeball of the subject by a display device that is secured to a head of the subject, the reference position being where a front line of sight of the eyeball of the subject who looks forward straightly, crosses the display screen; changing a direction of a line of sight from the eyeball to the display information by switching the display information to other contents while changing a displayed position of the display information; and judging whether the subject can recognize the contents of the display information at the changed position, to measure the rotation characteristics of the eyeball.

Abstract: A measuring method for measuring sensitivity of eye around certain line of sight includes: showing image of predetermined pattern on a display screen showing in front of eyeball of subject by display device secured to head; showing fixation target focused on by subject, on display screen to make line of sight of subject; showing change region where predetermined pattern image is changed, at anisotropic area around intersection point or fixation target in screen is separated from intersection point and fixation target, intersection point wherein subject certain line of sight focuses on fixation target, crosses display screen; showing change region where predetermined image pattern is changed on display screen, wherein change region manner is continuously or intermittently brought close to or away from intersection point or fixation target in display screen; and determining range wherein subject senses change region by bringing it close or away from intersection point or fixation target.