YOU have a high IQ and perfect vision if you can help this baffled doctor find his missing patients.

This mind-boggling optical illusion involves a seemingly normal image of a suited man holing a top hat.

But hidden within the picture are a number of patients that the doctor is hopelessly searching for.

The old-fashioned style image shows a short man standing on what appears to be an uneven surface.

As he topples to one side, we challenge puzzlers to look beneath the surface and spot the other faces that are hidden within the photo.

The image is made up of what seems to be black pen strokes on beige paper – but don’t this distract you from your goal.

Titled: “The Doctor And His Patients”, there is no trick here, but you’ll need razor-sharp eyesight to complete the challenge.

Optical illusions are becoming a popular daily activity for those who are looking to test not just their brainpower, but their eyesight too.

Don’t worry if you’re struggling though, as we have the solution below.

Need a hint?

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Try focussing your eyesight on the doctor’s head, you may spot something suspicious if you turn your device sideways.

Next, check out the man’s waistcoat – there seems to be something hidden there too.

And if you found this optical illusion too difficult – or too hard – then why not give this brain teaser a go?

You could have a super high IQ if you can spot the hidden animal in this image of a matchstick in just eight seconds.

This latest optical illusion requires you to really put your observational skills to the test as you race against the clock.

In the image provided by FreshersLive, there is a black and white drawing on top of a red background.

But to find the hidden animal, you must first locate the matchstick.

If you can focus your attention on all these small details, then you should be able to identify the hidden animal.