Hedieh took to TikTok to share a video explaining the illusion, based on the All Is Vanity painting by Charles Allen Gilbert.

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“When you look at this picture, what do you see?” she began.

“If you instantly notice the skull, it means you’re a bit of a cynic or realist and think beautiful things don’t last forever.”

However, other people might have seen the woman looking in the mirror first.

With Hedieh continuing: “If you saw the woman looking in the vanity mirror first, it means you’re a bit naive and maybe unaware of the threats and the consequences.”

People were quick to weigh in in the comments section, with one writing: “Wonderful.

“Thank you so much Hedieh.”

“I saw two women enjoying tea on a table,” another added.

“Sure the skull is there too, but not as important.”

“Skull, everyone sees the skull,” a third insisted.

But someone else argued that wasn’t true, as they’d seen the “woman looking in the mirror” first.

“Realist, 100%,” another wrote.

As someone else mused: “I saw both at exactly the same time!”