Volume Volume1\Perspective of Disappearance
Entry# 227. On indistinctness at short distances (227-231).
Contents: Vol. 1 | Vol. 2
If you place an opaque object in front of your eye at a distance of
four fingers' breadth, if it is smaller than the space between the
two eyes it will not interfere with your seeing any thing that may
be beyond it. No object situated beyond another object seen by the
eye can be concealed by this nearer object if it is smaller than
the space from eye to eye.