PURPOSE: To vertically move the position of a curved reflection mirror matched with the feature of a mounting person and a using form by placing the rotary axis of a movable arm and the focus position of the curved reflection mirror near an axis passing through the approximate center of both eyes of the mounting person.

CONSTITUTION: The connection shaft 111 of the movable arm 108 and a supporting arm 106 approximately coincides with a center axis passing through the approximate center of both eyes of the mounting person and the movable arm 108 can be vertically rotated on a face with the shaft as the center. At the time, since the focusing distance of the mirror is set so as to let the convergence position 117 of the curved reflection mirror 110 positioned on the center axis and be near the eye 113 closer to the movable arm 108, even when the movable arm 108 rotates and moves from a horizontal line-of-sight direction to a lower direction, a liquid crystal panel unit 109 and the curved reflection mirror 110 rotate with the center axis as the center while maintaining the position relation. In the meantime, light beams reflected from the curved reflection mirror 110 are converged to the eyes of the mounting person at all times.