• Automaticity of saccades
  Saccadic automation is not able to work to the full extent. With a great number of similar objects in the vision field (spots on the fabric, stripes on "sailor's striped vest", concentric rings in "projector" test) a human being is not able to determine at which object he has fixed his look before a saccade and at which one after.
  
  

• Binocular vision
  Binocular vision (when both eyes are looking at the same object) are also not able to work in aggressive environment to the full extent. That is associated with the fact that with great number of alike visible elements it is impossible to converge the eyes to the same dot.
  
  

• On- anf off-systems
  On- and off- systems are not able to work in aggressive visible environment in their usual mode. A great number of objects available in the vision field leads to excessive load of such systems. For example, when shifting a look from one end of a multi-storied building to the other, the eyes cross a white wall and dark windows for many times. In this case, owing to the nature of eye photoreceptors, every crossing of "white-black" and "black-white" boundary makes on- and off- systems to actuate, and that, in its turn, creates a large flow of signals coming from the eye retina to vision centers of the cortex. However, this large afferent flow does not carry important information since aggressive field is clear at the first sight to the full extent.

Homogeneous and aggressive visual fields are most harmful for people. Straight lines and right angles, huge still planes and poor color gamut are also harmful for people and create unfavourable visual environment of cities and towns