= Ricco's law
{wiki=Ricco's_law}
Ricco's Law is a principle in the field of visual perception and relates to the way our eyes perceive brightness and contrast over small areas of visual stimuli. Specifically, it states that the perceived brightness of a region of light is directly proportional to the area over which the light is spread. In other words, as the area of illumination increases, the perceived brightness also increases, but this relationship holds true only over relatively small areas.
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