You have 'world's sharpest eyes' if you can spot hidden deer in garden picture

Optical illusions and visuals puzzles aren't just good for your brain, they're also tantalisingly fun and this one will either make you feel incredibly smug or it might make you want to tear your hair out with frustration. How quickly you can find the deer hidden in this picture might well depend on how good your eyesight is, and how observant you are.

Optical illusions, brain teasers and other types of puzzles are said to have a huge range of benefits for your brain: they can be helpful when trying to relax and unwind after a hard day's work, improve your memory, and improve different types of reasoning - like spatial and visual.

One has even shown that undertaking a daily puzzle can help stave off dementia, in those who were dealing with mild symptoms of cognitive impairment. All round, they're worth doing - especially because being able to master them comes with the most important thing of all: bragging rights.

This seemingly normal photo of a garden contains a deer somewhere inside of it, and to spot it in within six seconds might mean you've got incredibly good eyesight - and that you can immediately send it to all your friends, safe in the knowledge that you're likely the one of the keen eyed amongst them to see how they compare. Take a look below to see just how sharp your eye for detail is.

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Any luck? If it took you a little longer than six seconds, don't worry, most of our aren't what they used to be, thanks to our tech addicted lifestyles. If you managed to find the deer in under 30 seconds, or even a minute, that's still pretty decent. Equally, if you didn't find the deer at all, scroll down to see just where it was hidden all along.

Now you know where the deer is, let's get into the different types of optical illusions you might encounter while on your puzzling adventures. There are three main kinds: literal, cognitive and physiological. The first kind, literal, compress two images into one - you might see a bird, your partner an elephant. These are the most common type you're likely to come across. Cognitive optical illusions are tricksters, going for your brain and what your eyes see at once, and they are often the most complicated: we will make a safe assumption about what we see, but the image will contradict it. Physiological illusions take advantage of how we take in light and colour, still 2D images begin to move and create the appearance of depth by overstimulating the brain.

How long did it take you to find the deer? Let us know in the comments below.