{"id":4059,"date":"2026-07-02T15:02:49","date_gmt":"2026-07-02T13:02:49","guid":{"rendered":"https:\/\/museumofillusions.es\/?post_type=blog&#038;p=4059"},"modified":"2026-07-13T11:14:16","modified_gmt":"2026-07-13T09:14:16","slug":"jastrow-illusion-history-explanation","status":"publish","type":"blog","link":"https:\/\/museumofillusions.es\/en\/b\/jastrow-illusion-history-explanation\/","title":{"rendered":"Jastrow Illusion: the optical illusion that makes two identical shapes look different"},"content":{"rendered":"\n\n<header id=\"navigation\" class=\"navigation   show\">\n\n  \n<div class=\"nav-bar c header--transparent desktop\">\n\n  <div class=\"nav-bar__left\">\n    <a href=\"https:\/\/museumofillusions.es\/en\/\" aria-label=\"Museum of Illusions Madrid Immersive Experiences\" data-home=\"true\" class=\"logo js-close-menu\">\n      <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2024\/05\/Vector-2.png\" rel=\"preload\" 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<p class=\"sub-headline\">2.07.2026.<\/p>\n    \n    <h1 class=\"h3\">Jastrow Illusion: the optical illusion that makes two identical shapes look different<\/h1>\n  <\/div>\n\n  <div class=\"desktop\">\n    \n<picture class=\"mw\">\n    <source sizes=\"50vw\" media=\"(min-width: 479px)\" srcset=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/ilusion-jastrow_1_1_1.png\" type=\"\">\n\n      <img fetchpriority=\"high\" decoding=\"async\" loading=\"eager\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/ilusion-jastrow_1_1_1.png\" alt=\"ilusion jastrow_(1)_(1)_(1)\" width=\"1448\" height=\"1086\" title=\"\">\n  <\/picture>  <\/div>\n\n  <div class=\"mobile\">\n    \n<picture class=\"mw\">\n    <source sizes=\"50vw\" media=\"(min-width: 479px)\" srcset=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/ilusion-jastrow_1_1_1.png\" type=\"\">\n\n      <img fetchpriority=\"high\" decoding=\"async\" loading=\"eager\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/ilusion-jastrow_1_1_1.png\" alt=\"ilusion jastrow_(1)_(1)_(1)\" width=\"1448\" height=\"1086\" title=\"\">\n  <\/picture>  <\/div>\n\n<\/section>\n\n\n<section class=\"blog-content text-content\">\n  <div class=\"c\">\n    \n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Have you ever compared two objects that seemed completely different in size, only to discover they were actually identical? It may sound impossible, but your brain is capable of making exactly that mistake.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The Jastrow illusion is one of the most surprising optical illusions<\/strong> because it uses two identical shapes to convince us that one is noticeably larger than the other. Like many famous visual illusions, it reminds us that perception is not simply about seeing\u2014it is about how our brain interprets what our eyes observe.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">\n<h6><strong>What Is the Jastrow Illusion?<\/strong><\/h6>\n<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">The Jastrow illusion consists of two identical curved shapes, often compared to railway tracks, boomerangs, or slices of a ring.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This simple experiment reveals one of the brain's most fascinating characteristics: our perception depends heavily on context.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When one shape is placed directly beneath the other, the lower one appears larger, longer, or wider, even though both are exactly the same size.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The illusion is so convincing that many people refuse to believe the shapes are identical until they physically place one on top of the other.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">\n<h6><strong>The Story of Joseph Jastrow<\/strong><\/h6>\n<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">The illusion is named after <strong>Joseph Jastrow<\/strong>, an American psychologist born in 1863.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jastrow was one of the pioneers of experimental psychology in the United States and dedicated much of his career to studying perception, attention, and the way our minds process information.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">He introduced this illusion in 1892 while investigating how visual comparisons could influence our judgment. Rather than proving that our eyesight was unreliable, Jastrow wanted to demonstrate that the brain constantly interprets visual information instead of recording it objectively.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">His research became highly influential, helping establish the scientific study of perception and inspiring generations of psychologists and neuroscientists.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Today, the Jastrow illusion remains one of the best-known demonstrations of how easily our brains can be fooled.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">\n<h6><strong>Why Does the Jastrow Illusion Fool Us?<\/strong><\/h6>\n<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike many <a href=\"https:\/\/museumofillusions.es\/en\/exhibit\/optical-illusions\/\">optical illusions<\/a> that rely on perspective or depth, the Jastrow illusion works because our brain compares neighboring edges rather than entire objects.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the two curved shapes are placed together, the longer outer edge of one sits next to the shorter inner edge of the other. Instead of comparing the complete figures, our visual system focuses on these adjacent edges, making one shape appear larger.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This happens automatically and almost instantly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Even after learning that both pieces are identical, many people continue to perceive one as being bigger. Knowing the truth does not always change what we see.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The illusion highlights an important fact about human vision: our brain prioritizes speed over perfect accuracy.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">\n<h6><strong>Where Can We Find the Jastrow Illusion?<\/strong><\/h6>\n<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Although it may appear to be a laboratory experiment, the same visual principles influence many aspects of everyday life.<br>Designers, architects, artists, and psychologists have long been interested in how context affects perception.<br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The ideas behind the Jastrow illusion can be seen in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Graphic and product design.<\/li>\n\n\n\n<li>Architecture and interior spaces.<\/li>\n\n\n\n<li>Advertising and visual communication.<\/li>\n\n\n\n<li>Educational demonstrations about perception.<\/li>\n\n\n\n<li>Cognitive psychology and neuroscience research.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding these visual effects helps professionals create designs that are easier to understand, more visually balanced, and more engaging.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">\n<h6><strong>What Does the Jastrow Illusion Teach Us?<\/strong><\/h6>\n<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">The Jastrow illusion reminds us that seeing is not the same as measuring.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Every second, our brain interprets enormous amounts of visual information. To process it efficiently, it relies on shortcuts, comparisons, and previous experiences.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Most of the time, those shortcuts help us navigate the world quickly and accurately. Occasionally, however, they create fascinating errors that reveal how perception really works.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rather than exposing weaknesses in our vision, illusions like this demonstrate just how sophisticated the brain truly is. They allow scientists to study the hidden processes that shape every image we experience.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">\n<h6><strong>Experience the Jastrow Illusion at the Museum of Illusions<\/strong><\/h6>\n<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\">Looking at a picture of the Jastrow illusion is fascinating, but experiencing it in person makes its effect even more surprising.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At the Museum of Illusions Madrid, you'll discover visual illusions that challenge your perception and reveal how your brain constructs reality. Exhibits like the Jastrow illusion invite visitors of all ages to question what they see, explore the science behind perception, and enjoy interactive experiences that make learning unforgettable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you're passionate about psychology, curious about optical illusions, or simply looking for an original activity in Madrid, experiencing these illusions firsthand offers a completely new way to understand how your mind works.<\/p>\n\n\n  <\/div>\n<\/section>\n\n\n<section class=\"blogs-listing\" data-total=\"36\" data-type=\"blog\">\n  <div class=\"c\">\n              \n      <ul class=\"workOuterShell\">\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/rubin-vase-history-explanation\/\" aria-label=\"Rubin Vase: The Optical Illusion That Forces You to Choose Between Two Realities\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/jarron-rubin.png\" alt=\"Rubin Vase: The Optical Illusion That Forces You to Choose Between Two Realities\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">23.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/rubin-vase-history-explanation\/\" aria-label=\"Rubin Vase: The Optical Illusion That Forces You to Choose Between Two Realities\" class=\"article-name\">\n      <h2 class=\"h4\">Rubin Vase: The Optical Illusion That Forces You to Choose Between Two Realities<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/kids-crafts-madrid-summer\/\" aria-label=\"Kids&#039; crafts in Madrid: a creative summer activity\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/kids-crafts-madrid-summer.jpg\" alt=\"Kids&#039; crafts in Madrid: a creative summer activity\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">22.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/kids-crafts-madrid-summer\/\" aria-label=\"Kids&#039; crafts in Madrid: a creative summer activity\" class=\"article-name\">\n      <h2 class=\"h4\">Kids' crafts in Madrid: a creative summer activity<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/summer-workshops-children-madrid\/\" aria-label=\"Summer workshops for children in Madrid: learning through play among illusions\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/summer-workshop-forchildren.png\" alt=\"Summer workshops for children in Madrid: learning through play among illusions\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">13.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/summer-workshops-children-madrid\/\" aria-label=\"Summer workshops for children in Madrid: learning through play among illusions\" class=\"article-name\">\n      <h2 class=\"h4\">Summer workshops for children in Madrid: learning through play among illusions<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/little-tourist-passport-discover-madrid\/\" aria-label=\"The Little Tourist&#039;s Passport: discover Madrid\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/little-tourist-passport.jpg\" alt=\"The Little Tourist&#039;s Passport: discover Madrid\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">13.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/little-tourist-passport-discover-madrid\/\" aria-label=\"The Little Tourist&#039;s Passport: discover Madrid\" class=\"article-name\">\n      <h2 class=\"h4\">The Little Tourist's Passport: discover Madrid<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/stereograms-how-they-work\/\" aria-label=\"Stereograms: the images that hide an entire three-dimensional world\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/esterogramas-1.png\" alt=\"Stereograms: the images that hide an entire three-dimensional world\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">10.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/stereograms-how-they-work\/\" aria-label=\"Stereograms: the images that hide an entire three-dimensional world\" class=\"article-name\">\n      <h2 class=\"h4\">Stereograms: the images that hide an entire three-dimensional world<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/muller-lyer-illusion-history-explanation\/\" aria-label=\"M\u00fcller-Lyer Illusion: the story behind the drawing that proves you can&#039;t always trust tour eyes\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/ilusion-muller_2.png\" alt=\"M\u00fcller-Lyer Illusion: the story behind the drawing that proves you can&#039;t always trust tour eyes\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">2.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/muller-lyer-illusion-history-explanation\/\" aria-label=\"M\u00fcller-Lyer Illusion: the story behind the drawing that proves you can&#039;t always trust tour eyes\" class=\"article-name\">\n      <h2 class=\"h4\">M\u00fcller-Lyer Illusion: the story behind the drawing that proves you can't always trust tour eyes<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/jastrow-illusion-history-explanation\/\" aria-label=\"Jastrow Illusion: the optical illusion that makes two identical shapes look different\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/ilusion-jastrow_1_1_1.png\" alt=\"Jastrow Illusion: the optical illusion that makes two identical shapes look different\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">2.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/jastrow-illusion-history-explanation\/\" aria-label=\"Jastrow Illusion: the optical illusion that makes two identical shapes look different\" class=\"article-name\">\n      <h2 class=\"h4\">Jastrow Illusion: the optical illusion that makes two identical shapes look different<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/smurfs-arrive-in-madrid\/\" aria-label=\"The Smurfs arrive at the Museum of Illusions Madrid\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/07\/smurfs-moi.png\" alt=\"The Smurfs arrive at the Museum of Illusions Madrid\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">2.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/smurfs-arrive-in-madrid\/\" aria-label=\"The Smurfs arrive at the Museum of Illusions Madrid\" class=\"article-name\">\n      <h2 class=\"h4\">The Smurfs arrive at the Museum of Illusions Madrid<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/nose-swap-optical-illusion\/\" aria-label=\"Nose swap: the optical illusion that transforms your reflection\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/Image00001.jpg\" alt=\"Nose swap: the optical illusion that transforms your reflection\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">1.07.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/nose-swap-optical-illusion\/\" aria-label=\"Nose swap: the optical illusion that transforms your reflection\" class=\"article-name\">\n      <h2 class=\"h4\">Nose swap: the optical illusion that transforms your reflection<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/magic-optical-illusions-difference\/\" aria-label=\"Magic and optical illusions: what&#039;s the difference?\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/06\/magic-optical-illusions-difference.webp\" alt=\"Magic and optical illusions: what&#039;s the difference?\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">News \/ 26.06.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/magic-optical-illusions-difference\/\" aria-label=\"Magic and optical illusions: what&#039;s the difference?\" class=\"article-name\">\n      <h2 class=\"h4\">Magic and optical illusions: what's the difference?<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/pride-day-madrid\/\" aria-label=\"Pride Day in Madrid: plans, color and new ways to look at the city\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/06\/Dia-orgullo-gay-madrid-scaled.jpg\" alt=\"Pride Day in Madrid: plans, color and new ways to look at the city\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">News \/ 24.06.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/pride-day-madrid\/\" aria-label=\"Pride Day in Madrid: plans, color and new ways to look at the city\" class=\"article-name\">\n      <h2 class=\"h4\">Pride Day in Madrid: plans, color and new ways to look at the city<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/moire-effect-history-illusion-creates-patterns\/\" aria-label=\"Moir\u00e9 Effect: the story behind the optical illusion that creates patterns where none exist\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/06\/efecto-moiree-historia-ilusion-crea-patrones.jpg\" alt=\"Moir\u00e9 Effect: the story behind the optical illusion that creates patterns where none exist\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">News \/ 23.06.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/moire-effect-history-illusion-creates-patterns\/\" aria-label=\"Moir\u00e9 Effect: the story behind the optical illusion that creates patterns where none exist\" class=\"article-name\">\n      <h2 class=\"h4\">Moir\u00e9 Effect: the story behind the optical illusion that creates patterns where none exist<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/moving-image-optical-illusion\/\" aria-label=\"Moving image: the optical illusion that seems to follow you\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/06\/imagen-en-movimiento-ilusion.png\" alt=\"Moving image: the optical illusion that seems to follow you\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">News \/ 18.06.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/moving-image-optical-illusion\/\" aria-label=\"Moving image: the optical illusion that seems to follow you\" class=\"article-name\">\n      <h2 class=\"h4\">Moving image: the optical illusion that seems to follow you<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/zoetrope-motion-illusion\/\" aria-label=\"Zoetrope: the optical illusion that brought movement to life\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/06\/zootropo.png\" alt=\"Zoetrope: the optical illusion that brought movement to life\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">18.06.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/zoetrope-motion-illusion\/\" aria-label=\"Zoetrope: the optical illusion that brought movement to life\" class=\"article-name\">\n      <h2 class=\"h4\">Zoetrope: the optical illusion that brought movement to life<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/upside-down-room-optical-illusion\/\" aria-label=\"Upside Down Room: the optical illusion where you defy gravity\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/cuarto-invertido-ilusion-optica.png\" alt=\"Upside Down Room: the optical illusion where you defy gravity\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">28.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/upside-down-room-optical-illusion\/\" aria-label=\"Upside Down Room: the optical illusion where you defy gravity\" class=\"article-name\">\n      <h2 class=\"h4\">Upside Down Room: the optical illusion where you defy gravity<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/lingering-light-bulb-retinal-persistence\/\" aria-label=\"Lingering light bulb: the optical illusion that stays in your retina\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/bombilla-remanente-ilusion-optica.png\" alt=\"Lingering light bulb: the optical illusion that stays in your retina\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">28.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/lingering-light-bulb-retinal-persistence\/\" aria-label=\"Lingering light bulb: the optical illusion that stays in your retina\" class=\"article-name\">\n      <h2 class=\"h4\">Lingering light bulb: the optical illusion that stays in your retina<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/visual-effects-that-look-like-magic\/\" aria-label=\"Visual effects that look like magic, but are actually science\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/cabeza-bandeja-ilusion-optica.png\" alt=\"Visual effects that look like magic, but are actually science\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">27.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/visual-effects-that-look-like-magic\/\" aria-label=\"Visual effects that look like magic, but are actually science\" class=\"article-name\">\n      <h2 class=\"h4\">Visual effects that look like magic, but are actually science<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/ponzo-illusion\/\" aria-label=\"The Ponzo illusion: when the brain misinterprets size\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/01\/ilusion-ponzo-1-1-scaled.jpeg\" alt=\"The Ponzo illusion: when the brain misinterprets size\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">27.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/ponzo-illusion\/\" aria-label=\"The Ponzo illusion: when the brain misinterprets size\" class=\"article-name\">\n      <h2 class=\"h4\">The Ponzo illusion: when the brain misinterprets size<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/couples-plans-in-madrid\/\" aria-label=\"Couples&#039; plans in Madrid for unforgettable moments\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/couples-plans-in-madrid.jpg\" alt=\"Couples&#039; plans in Madrid for unforgettable moments\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">27.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/couples-plans-in-madrid\/\" aria-label=\"Couples&#039; plans in Madrid for unforgettable moments\" class=\"article-name\">\n      <h2 class=\"h4\">Couples' plans in Madrid for unforgettable moments<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/vortex-tunnel-optical-ilusion\/\" aria-label=\"Vortex Tunnel: the illusion that challenges your balance\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/tunel-vortice-ilusiones-opticas-1.webp\" alt=\"Vortex Tunnel: the illusion that challenges your balance\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">26.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/vortex-tunnel-optical-ilusion\/\" aria-label=\"Vortex Tunnel: the illusion that challenges your balance\" class=\"article-name\">\n      <h2 class=\"h4\">Vortex Tunnel: the illusion that challenges your balance<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/holograms-optical-illusion\/\" aria-label=\"Holograms: when light creates images that look real\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/hologramas-ilusiones-opticas.jpg\" alt=\"Holograms: when light creates images that look real\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">26.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/holograms-optical-illusion\/\" aria-label=\"Holograms: when light creates images that look real\" class=\"article-name\">\n      <h2 class=\"h4\">Holograms: when light creates images that look real<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/mirages-moire-effect\/\" aria-label=\"Mirages and moir\u00e9 effect: when your eyes don&#039;t tell the whole truth\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/espejismos-efectos-moire.jpg\" alt=\"Mirages and moir\u00e9 effect: when your eyes don&#039;t tell the whole truth\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">25.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/mirages-moire-effect\/\" aria-label=\"Mirages and moir\u00e9 effect: when your eyes don&#039;t tell the whole truth\" class=\"article-name\">\n      <h2 class=\"h4\">Mirages and moir\u00e9 effect: when your eyes don't tell the whole truth<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/children-museum-madrid\/\" aria-label=\"Children&#039;s museum in Madrid: learning through play with optical illusions\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/museo-infantil-madrid.jpg\" alt=\"Children&#039;s museum in Madrid: learning through play with optical illusions\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">25.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/children-museum-madrid\/\" aria-label=\"Children&#039;s museum in Madrid: learning through play with optical illusions\" class=\"article-name\">\n      <h2 class=\"h4\">Children's museum in Madrid: learning through play with optical illusions<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/plans-with-kids-madrid-original\/\" aria-label=\"Plans with kids in Madrid: looking at the city in a different way\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/05\/planes-con-ninos-en-madrid-originales.webp\" alt=\"Plans with kids in Madrid: looking at the city in a different way\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">25.05.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/plans-with-kids-madrid-original\/\" aria-label=\"Plans with kids in Madrid: looking at the city in a different way\" class=\"article-name\">\n      <h2 class=\"h4\">Plans with kids in Madrid: looking at the city in a 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href=\"https:\/\/museumofillusions.es\/en\/b\/summer-plans-madrid\/\" aria-label=\"Summer plans in Madrid: what to do when the heat gets serious\" class=\"article-name\">\n      <h2 class=\"h4\">Summer plans in Madrid: what to do when the heat gets serious<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/international-museum-day\/\" aria-label=\"International Museum Day: unique experiences you can&#039;t miss in Madrid\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/04\/dia-internacional-de-los-museos.jpg\" alt=\"International Museum Day: unique experiences you can&#039;t miss in Madrid\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div 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Illusions\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">16.04.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/may-bank-holiday-madrid\/\" aria-label=\"May Bank Holiday in Madrid: from carnations to Illusions\" class=\"article-name\">\n      <h2 class=\"h4\">May Bank Holiday in Madrid: from carnations to Illusions<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/mothers-day-plans-madrid\/\" aria-label=\"Mother\u2019s Day plans in Madrid: the best gift is a moment together\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/04\/planes-dia-de-la-madre-madrid-1.jpg\" alt=\"Mother\u2019s Day plans in Madrid: the best gift is a moment together\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">16.04.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/mothers-day-plans-madrid\/\" aria-label=\"Mother\u2019s Day plans in Madrid: the best gift is a moment together\" class=\"article-name\">\n      <h2 class=\"h4\">Mother\u2019s Day plans in Madrid: the best gift is a moment together<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/visual-perception\/\" aria-label=\"Visual perception: how your brain constructs what you see\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/04\/Image00002-1.jpg\" alt=\"Visual perception: how your brain constructs what you see\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">13.04.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/visual-perception\/\" aria-label=\"Visual perception: how your brain constructs what you see\" class=\"article-name\">\n      <h2 class=\"h4\">Visual perception: how your brain constructs what you see<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/easter-plans-with-kids-madrid\/\" aria-label=\"Easter plans with kids in Madrid: original ideas\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" 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decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/03\/experimentos-visuales-ninos.jpg\" alt=\"Visual experiments for kids that spark curiosity\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">20.03.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/visual-experiments-for-kids-that-spark-curiosity\/\" aria-label=\"Visual experiments for kids that spark curiosity\" class=\"article-name\">\n      <h2 class=\"h4\">Visual experiments for kids that spark curiosity<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/ladybug-returns-to-madrid\/\" aria-label=\"Ladybug returns to Madrid\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/03\/ladybug-1.webp\" alt=\"Ladybug returns to Madrid\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">20.03.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/b\/ladybug-returns-to-madrid\/\" aria-label=\"Ladybug returns to Madrid\" class=\"article-name\">\n      <h2 class=\"h4\">Ladybug returns to Madrid<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/fathers-day-plans-madrid\/\" aria-label=\"The best Father\u2019s Day gift isn\u2019t always wrapped\" class=\"image image--style-1\">\n        <img decoding=\"async\" class=\"image__element\" loading=\"lazy\" src=\"https:\/\/museumofillusions.es\/wp-content\/uploads\/2026\/03\/8-1-1-1.jpg\" alt=\"The best Father\u2019s Day gift isn\u2019t always wrapped\" title=\"\">\n      <\/a>\n    <\/div>\n  \n  <div class=\"article-card__headline\">\n          <span class=\"sub-headline\">13.03.2026.<\/span>\n    \n    <a href=\"https:\/\/museumofillusions.es\/en\/fathers-day-plans-madrid\/\" aria-label=\"The best Father\u2019s Day gift isn\u2019t always wrapped\" class=\"article-name\">\n      <h2 class=\"h4\">The best Father\u2019s Day gift isn\u2019t always wrapped<\/h2>\n    <\/a>\n  <\/div>\n<\/article>\n          <\/li>\n                  <li class=\"item\">\n            \n<article class=\"article-card\">\n      <div class=\"article-card__image\">\n      <a href=\"https:\/\/museumofillusions.es\/en\/b\/this-christmas-give-the-gift-of-wonder-and-moments-kept-in-the-heart\/\" aria-label=\"This Christmas, give the gift of wonder and moments kept in the heart\" class=\"image image--style-1\">\n       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<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":4063,"menu_order":0,"template":"","categories":[],"tags":[63,62,61,60],"class_list":["post-4059","blog","type-blog","status-publish","has-post-thumbnail","hentry","tag-and-why-your-brain-gets-it-wrong","tag-explanation","tag-explanation-and-why-your-brain-gets-it-wrong","tag-jastrow-illusion-history"],"acf":[],"_links":{"self":[{"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/blog\/4059","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/types\/blog"}],"version-history":[{"count":5,"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/blog\/4059\/revisions"}],"predecessor-version":[{"id":4161,"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/blog\/4059\/revisions\/4161"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/media\/4063"}],"wp:attachment":[{"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/media?parent=4059"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/categories?post=4059"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/museumofillusions.es\/en\/wp-json\/wp\/v2\/tags?post=4059"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}