YOU have 20/20 vision if you can spot the horse hidden in this tricky optical illusion - and it's more difficult than you think.
The mind-boggling image challenges viewers to take a hard look at the black-and-white woodland scene.
It shows a man leaning against his backpack whilst feeding a bird from his hand and surrounded by trees.
Although it is not immediately obvious, there is a four-legged animal hidden amongst the foliage.
Optical illusion fanatics have wracked their brain trying to find the equine that is so expertly hidden.
But it is actually the outline of a horse that can be seen above the man's - its head made up of branches from the overhanging trees.
The optical illusion challenges the most intelligent among us to look beyond the obvious and focus on shapes hidden in the image.
Optical illusions and brainteasers are becoming a popular daily activity for those who are looking to test not just their eyesight, but their brainpower too.
But if this optical illusion was too easy - or too hard - for you, then why not give these fun games a go?
If you're a fan of construction, they try spotting the glasses among the tools in this tricky brainteaser in less than 25 seconds.
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Or, figure out if you're left or right-brained by counting how many watermelons you can see in this mind-bending illusion.