illusion of focus

The illusion of focus occurs when our eyes appear to concentrate sharply on a specific point, but in reality, our visual system processes a much wider area with less detail. When we look directly at something, only a small central part (the fovea) sees fine detail clearly, while the rest is perceived more vaguely. Our brain often fills in missing information, giving the impression that our entire field of view is in sharp focus. This creates an illusion that we are fully aware of the entire scene in high detail, even though our visual resolution is actually limited to a small central area.