Fig. 2.
Those things look smallest over which the eye moves with least resistance.
In Figure 3, the distance from A to B looks longer than the distance from B to C because of the time we involuntarily take to notice each dot, yet the distances are equal.
Fig. 3.
Being and Seeming
For the same reason, the hatchet line (A–B) appears longer than the unbroken line (C–D) in Figure 4, and the lines E and F appear longer than the space (G) between them, although all are of equal length.