Fig. 260.211

Fig. 260.211 Humans' Range-finding Optical System: Our two eyes form the baseline of an isosceles triangle and seek to discern the convergent angle at the opposite object apex: for instance, tracks A or B, with the distance between A and B constant. Farther away they become shorter chords of ever larger circles and finally appear to be congruent.

Copyright © 1997 Estate of R. Buckminster Fuller