This is because the shortest edge of "A" is directly adjacent to the longest edge of "B".ĭescribed by British psychologist James Fraser in 1908, this aspiral is known as the "false spiral". Named by Robert Jastrow in 1889, figure "B" appears to be larger, although they are the same size. Your brain automatically adjusts images that seem distant to compensate for being the same size. It has two rectangular teeth at one end that turn into three cylindrical teeth at the other.įound in virtually every psychology book in the world, the two monsters of this illusion are, in fact, the same size. This is one of the most famous impossible objects. When you look at the image, your brain creates outlines of a triangle, although it does not exist. Kanizsa's triangle was named after the psychologist Gaetano Kanizsa, who described its effect. Stare at the image for about half a minute without moving your eyes and watch it gradually disappear. If you look directly at one of the intersections, the point disappears. Everywhere the white lines cross, our eyes see gray dots. Hermann's grid was named Ludimar Hermann, who discovered it in 1870.
If you fix your eyes on the point in the center and move the head away from the screen, the rings will begin to rotate. Now, let's have fun, and see these optical illusions! OK, so, an optical illusion it’s an illusion that happens when our brain doesn’t process information well, and ends up generating another one, which when we see it, something very different. According to that, there are three main classes: physical, physiological, and cognitive illusions, and in each class there are four kinds: Ambiguities, distortions, paradoxes, and fictions. Illusions come in a wide variety their categorization is difficult because the underlying cause is often not clear but a classification proposed by Richard Gregory is useful as an orientation. Hello again! Now, I'm going to show some optical illusions that made you crazy!įirst, we are going to see what is an optical illusion.Īn optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by a visual percept that arguably appears to differ from reality.
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