Fig. 5From: How can basic research on spatial cognition enhance the visual accessibility of architecture for people with low vision?For a viewer standing on a ground plane, the distance (d) to locations on the ground can be computed using the horizon-distance relation (angle of declination), scaled by eye height (h): d = h cot θ. “Human body front and side” image by Nanoxyde licensed under CC BY-SA 3.0Back to article page