He estimated the approximate range of his perception; in the absence of any barriers, he could accurately perceive up to about two hundred meters. Beyond that range, his sense would become extremely vague, akin to how one could see to the furthest distance at a glance—although it could still be considered "seeing," there was no knowledge of the details.
If there were obstructions in between, the precise range would shrink further, especially in the case of completely enclosed spaces compared to the open outdoors or semi-enclosed walls, imposing more limitations. Not that he couldn't discern whether there were people or moving objects—this was no problem after the evolution—but he couldn't know everyone's actions in the square with his eyes closed like he could now.
The ultimate limit should be one hundred fifty meters, but in reality, beyond one hundred meters, his judgments became less accurate.
In addition, he gained a new understanding of spatial barriers, such as walls.
