The eyes are the window to your personality, so it's essential that they're in good shape. A vision test can tell you if something needs fixing or not before any problems arise! The darkest rectangle is the third one, right in the middle.

Here are two letters hidden - the O and the R. To some, vision may seem like the most basic sense. After all it's what you use to see! But when we think about our eyes and how much they contribute towards making life easier in so many ways for us as humans - from reading signs on walls or television screens; following movements of people around them at parties through closeup views such as reading facial expressions- does anyone ever consider that their finest feature could also be one major source for discomfort due not only its size but function?

When you look at these lines, they seem all different lengths and offset. But in actuality the same length with an ending point on either side makes them appear more uniform for our brain to process easily. Our eyes become accustomed to corners which is why we see angles like this as well - leading us into confusion about what exactly it could be pointing out from among many other things surrounding that specific area.

This triangle trick will test even the sharpest of minds for at least a few minutes. The correct answer is 24. That's quite an impressive mind you have there!

The answer is four. The elephant illusion is one of the most popular examples in which people are tricked into seeing something that isn't there because their brain cannot help but fill in gaps. It's also called a "figure-ground" impossible, meaning you have trouble telling what's real and fake when looking at this type illustration by Roger Shepard (1990).

When you think about the colors in this image, do four come to mind? Turns out three is more like it! The square on top seems blue and pink stripes; while another one in lower left appears green or orange depending upon how closely aligned your eyes are with respect to each other (or if they're halfway across town). But surprise--both blues are actually just darker versions of white rather than distinct shades themselves.

Neither, these two pears are exactly the same color! 

The correct answer is 3. Congrats if you found all of them!

Testing your eyesight is a great way to find out what you're able before going in for any type of medical procedure. If the answer was correct then there's no need go see Doc! It's hidden in column A.

While it may seem like the most simple tasks are often those that present a challenge, there's always something mentally stimulating about trying to solve these complicated puzzles. Take this puzzle; you're challenged with what seems laughably easy: counting squares! It won't be as straightforward though- your goal in doing so is to match up numbers corresponding with similar images. With such clear instructions on how they want us solve them...I'm sure anyone can figure out their answer, which is 40.

The phantom edge phenomenon is an illusion where our brains fill in the gaps and create what seems to be a triangle. There are no actual triangles anywhere in the illustration.

If you’re a ’90s kid, then you definitely remember “Magic Eye” photos! The hidden word is THANK YOU

Look at the picture with more attention and you will see the hidden elephant in the foreground with two giant trees which served as its legs and the smaller tree serving as its trunk.

It is sometimes difficult to distinguish the colour. In this case, the largest circle is also the brightest. The correct answer is D. 

The star-like shape contains 30 triangles.

1 and 2 are the same color.

Yes, it may seem obvious when you first see the picture but look carefully before deciding.

Remember, think a little outside the box. There are four circles!

There are 2 odd hearts hidden in this picture:

The image looks like something from another world! It's amazing how these simple tricks of light can fooled our eyes so badly. They sure don’t look it, but they are! Removing the smaller “stitch”-like lines shows the truth about this optical illusion.

Not only are they the exact same size, but their tops and bottoms are also directly in line with each other. 

These optical illusions will really challenge your perspective. When you can’t see the whole picture, these tricks are able to throw us for a loop! 

As you can see from the image on the right, it’s the one on the bottom (labelled in blue)—not the one on the top! 

In this picture, you can spot a cute little duck. Well, what, you didn't see it from the very beginning? A green duck!

Oh this is number 5, after all, you can see it at a glance. If you didn't recognize it from the beginning you may have problems with your eyesight. Maybe it's time to see an eye doctor for an eye test?

Of course, it is the letter B; after all, it stands out significantly against this background. Congratulations if you spotted it right, maybe you don't need glasses or you already have well-fitted glasses.

Well, we admit it - it wasn't easy. Hidden in that yellow background is the letter H. Congratulations if you spotted it, you have good eyesight and you certainly don't need to make an appointment with an eye doctor.

And what's the surprise? Don't you know? Well, we'll give you a hint. It is said to be man's best friend. It has four paws and sometimes a wagging tail. Do you know what it is? Of course - it's a dog.

We figured it out pretty well you have to admit it yourself. Hidden here is the letter A.

The code was not easy to read. Most people here got it wrong. But not you. You definitely gave the correct answer, didn't you? FGA, right?

The correct answer is, of course, the left side!