PURPOSE:To obviate the use of a dark room as an inspection room, and enable calibrating or measuring the data of an eye-ball movement in a natural condition by using a goggle as a frame body e-quipped with a target for forming a dark room in front of a subject's eyes, and applying an invisible infrared ray for irradiating an eye-ball. CONSTITUTION:There is provided a goggle 1 so mounted onto the head of a subject as to be freely detachable and shut out an outside visible ray for forming a dark room 2 in front of eyes. Ocular shifting parts 5 and 5a so adjustable as to near eye-balls 3 and 3a are provided in the aforesaid goggle 1. Also, invisible infrared sources 6 and 6a are provided on the ocular shifting parts 5 and 5a as an integral part thereof for irradiating the eye-balls 3 and 3a. TV cameras 7 and 7a are installed on respective ocular shifting parts 5 and 5a, and an eye ball movement is detected with reflected light from the aforesaid light sources 6 and 6a. The detected eye-ball movement is observed, recorded and analyzed via a video analysis device. Furthermore, targets 8 and 8a are arranged crosswise in vertical and horizontal directions on the bottom inner wall surfaces of the eye caps 9 and 9a of the predetermined shape about the center of eye-ball rotation on respective eye shifting parts 5 and 5a, corresponding to each of the eye-balls 3 and 3a. The targets 8 and 8a comprise a plurality of visible ray sources as a target group and are so made as to be selectable for indication.
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