This mind-boggling arrow optical illusion is going viral for tricking your brain

We all love a good optical illusion ... but this latest video has left our minds truly boggled!

The clip - which has gone viral after being shared on social media - features a simple 3D printed arrow that can’t point left, no matter which way the user turns it.

And boy does it leave you scratching your head!

This arrow by mathematician and sculptor Kokichi Sugihara can't point left. Here's how it works: It's 3D-printed with a bunch of curves our brains don't register. pic.twitter.com/Xa32GrI7ii
— Khai (@ThamKhaiMeng) August 4, 2019

Designed by mathematician and sculptor Kokichi Sugihara, the illusion relies on gentle curves on the arrow's surface to mislead the brain.

Sugihara specialises in creating spatial illusions that use variations in perspective and optics to manipulate our impression of the objects’ shapes.

The footage, which has been retweeted over 43,000 times, reveals the trick to the optical illusion when you look directly down on the arrow.

Seriously, how crazy is that?!

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