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The 19 best optical illusions that went viral and stumped the internet

INSIDER Logo By Jacob Shamsian of INSIDER | Slide 1 of 39:  The internet is filled with optical illusions, both intentional and accidental. The most famous one is The Dress, a photo that made a dress seem possibly black and blue or possibly white and gold, depending on who saw it and under what conditions. It ignited a firestorm of controversy around the web. Here are 19 0f the most puzzling optical illusions that have gone viral in the past few years, along with some explanations of how they work.

The internet is filled with optical illusions, both intentional and accidental.

The most famous one is The Dress, a photo that made a dress seem possibly black and blue or possibly white and gold, depending on who saw it and under what conditions. It ignited a firestorm of controversy around the web.

Here are 19 0f the most puzzling optical illusions that have gone viral in the past few years, along with some explanations of how they work.

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