Optical illusion: Only those with sharp vision can spot the four deer in just 11 seconds

At first glance, the picture seems to be nothing but a pile of ordinary stones and rubbish; however, that is not even close to it. In fact, four deers are actually hidden almost completely camouflaged in their surroundings behind the stones. The challenge is to test your sharp vision and try spotting all four deer in just 11 seconds.
The illusion is really tricky. This deer merges perfectly with the rocky background: its colors hardly distinguishable from the rubble it is sitting in. Such camouflage devices occur pretty often in nature, because the animals hide there using the predator itself. Yet here that would be your goal: to overcome the clever deer with its trickery and go through it.
This may be tough for some, but do not worry! If you’re running out of time or you get stumped, here’s a helpful clue: look for the center of the image where you might find a pair of eyes staring right back at you. Those eyes will lead you to one of the hidden deer, which increases your chances of finding the rest.
Still having a tough time? Okay, another clue: the four deer are actually fairly close together. Once you spot one of them, the rest should pop right out. So, take a close look at this image, because, as we’ll discuss later, it is a really difficult

optical illusion

that will tease your eyes-and even your mind.

If you cannot see all four deer in this picture, do not worry; the answer is below. Although you may not have been one of the lucky ones who made it, remember that optical illusions are a kind of fun workout for mental cognition. They force you to leave the easy way and train your brain to develop its ability to focus, keep alert, and make better choices.
Time limits are also used so that players make quicker decisions and their concentration is heightened, though quite useful in events requiring focus and mental clarity. Try your hand at it now. See if you can spot all four deer lurking in the rubble.