Perspective is nothing more than a rational demonstration applied to the consideration of how objects in front of the eye transmit their image to it,… - Leonardo da Vinci

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Perspective is nothing more than a rational demonstration applied to the consideration of how objects in front of the eye transmit their image to it, by means of a pyramid of lines. The Pyramid is the name I apply to the lines which, starting from the surface and edges of each object, converge from a distance and meet in a single point.