Optics principles. For example, the Ames room, Hering, Müller-Lyer, Orbison, Ponzo, Sander, and Wundt illusions all rely on the suggestion of the appearance of distance by using converging and diverging lines, in the same way that parallel light rays (or indeed any set of parallel lines) appear to converge at a vanishing point at infinity in two-dimensionally rendered images with artistic perspective. This suggestion is also responsible for the famous moon illusion where the moon, despite having essentially the same angular size, appears much larger near the horizon than it does at zenith. This illusion so confounded Ptolemy that he incorrectly
The Point! take the road indicated by the hand and make their way back to the Land of Point, where they receive a hero's welcome from the land's citizens, and the king. Oblio begins to tell his story but is interrupted by the furious count, who is then silenced by the king. Oblio tells the king and the people of the land that everything has a point, including the Pointless Forest, and himself. Angered, the count pulls off Oblio's pointed hat, but is taken aback when he sees a point on top of Oblio's bare head. Upon this revelation the points of