When you look at this red dot, what do you see? If your eyesight is good enough you'll note a picture hidden inside the circle.

The brain teaser purportedly tests the viewer's vision, with people claiming to see everything from a slim outline to a detailed picture.

Currently trending online, many viewers report being baffled by what the image actually shows.

Given the option to flip the image, the overturned dot reveals a detailed sketch of a horse with a mane, tail, saddle and bridle.

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The internet has been awash with puzzles lately including the hunt for answers in an old campsite sketch and challenges to spot the hidden characters in these illustrations by artist Dudolf.

• Scroll down for answers

Can you spot the egg in this Easter puzzle? Photo / Dudolf, Facebook
Can you spot the egg in this Easter puzzle? Photo / Dudolf, Facebook
Find the cat among the owls. Photo / Dudolf, Facebook
Find the cat among the owls. Photo / Dudolf, Facebook
Spot the panda hiding among the snowmen. Photo / Dudolf, Facebook
Spot the panda hiding among the snowmen. Photo / Dudolf, Facebook

How did you do?

Found it! Photo / Dudolf, Facebook
Found it! Photo / Dudolf, Facebook
Did you find the cat? Photo / Dudolf, Facebook
Did you find the cat? Photo / Dudolf, Facebook
There it is! Photo / Dudolf, Facebook
There it is! Photo / Dudolf, Facebook

- nzherald.co.nz