Fig. 1. Our head-mounted display (HMD) with a wide downward field of view (FoV). A) Side view. Blue: vertical FoV of the HTC VIVE. Part of the lower FoV is missing owing to the Liquid Crystal Displays (LCDs) housing. Orange: increased vertical FoV. Green: vertical FoV of a typical human. B) The added LCD and Fresnel lens. C) Original FoV of the HTC VIVE (approx. 70×70 [deg]). The user's hand is visible but not the lower limbs and body. D) FoV of the prototype (approx. 70×130 [deg]). The user's lower limbs and body and the ground are all visible at the same time.

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