Head mounted display device and method for providing visual aid using same

A head mounted display device that displays information videos in front of eyes of the user, the head mounted display device comprising:

• an external scene imaging unit that captures an external scene in a visual field area including a direct visually-recognized visual field of the user;
• a display controller that displays the external scene video captured by the external scene imaging unit on left-eye and right-eye video display screens separately arranged in front of the eyes of the user as left-eye and right-eye virtual image videos having a predetermined visible distance;
• a within-visual-field target object distance detector that detects an actual distance up to a target object shown inside the external scene video captured by the external scene imaging unit from the user;
• and
• a perspective video generator that generates virtual image videos to which depth perception is added by performing a predetermined treatment of the left-eye and right-eye virtual image videos,
• wherein the perspective video generator has a function of calculating a virtual image visible distance that approximately matches the actual distance in a case where the actual distance from the user to the target object is longer than a predetermined set distance and has a value larger than the actual distance in a case where the actual distance is shorter than the set distance on the basis of actual distance information of the target object detected by the within-visual-field target object distance detector and a predetermined sight information of the user.