Why do visual illusions occur? - Mark Changizi

What this episode covers

View full lesson: http://ed.ted.com/lessons/why-do-we-see-illusions-mark-changiziWhy can't our extremely complex eyes render simple optical illusions? Surprise, surprise -- it comes back to the brain, which has only evolved to encounter natural stimuli. At TEDYouth 2012, Mark Changizi explains how the brain reckons with optical illusions.Talk by Mark Changizi. Learn more about your ad choices. Visit megaphone.fm/adchoices

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How long is this episode of TED-Ed?

This episode is 9 minutes long.

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This episode was published on June 9, 2026.

What is this episode about?

View full lesson: http://ed.ted.com/lessons/why-do-we-see-illusions-mark-changiziWhy can't our extremely complex eyes render simple optical illusions? Surprise, surprise -- it comes back to the brain, which has only evolved to encounter natural...

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