Fig. 1.

Illustration of an urban street scene (“Crowded Street With Cars Passing By”, by Suzukii Xingfu; sourced from Pexels.com, under CC0) with cars, motorbikes, and pedestrians; (a) shows the entire scene, (b) shows a visualization of a useful field, approximately 15° radial from fixation, illustrating a commonly held misconception of the region of visual space around the point of fixation in which observers can perceive visual information, with the surrounding region faded out to illustrate how much information is missing