CAN YOU TRUST YOUR EYES?

"Can you trust your eyes?" is a question that prompts us to consider the reliability of our visual perception. In the following text, we will explore several illusions that demonstrate how our brains can be deceived by optical illusions. Each illusion will be presented for a duration of five seconds.

The first illusion involves two yellow lines that appear to be different lengths. However, upon closer inspection, we can see that they are actually the same length. This is an example of the Ponzo illusion, which occurs when our brains judge an object's size based on its background. Another illusion involves several intersecting lines that make it appear as though two longer lines are not parallel.

However, upon closer inspection, we can see that they are indeed parallel. This is an example of the Herring illusion, which occurs when our brains are influenced by the surrounding background. In another illusion, we are presented with an image of several spheres that appear to be different colours. However, upon closer inspection, we can see that they are all the same colour.

This illusion is caused by the stripes in the foreground, which make it appear as though the spheres are different colours. In an unusual room called "Am's room," we are presented with two people who appear to be different sizes. However, this is an illusion caused by the slanted walls and inclining ceiling and floor.

Our brains are used to rectangular rooms, so they correct the image for us, making the room appear normal and the people inside appear strange. Finally, we are presented with an image of a trident that appears to have four prongs. However, upon closer inspection, we can see that there are only three prongs.

The empty space between the prongs forms the central prong. In conclusion, these illusions demonstrate that our brains can be easily deceived by optical illusions. It is important to be aware of these illusions and to question our visual perception in order to avoid being misled. This phenomenon occurs due to the neural activity in the brain, where information is filtered and deemed either essential or useless.

When focusing on a specific point, the brain does not receive new information, and instead, the peripheral vision adapts to the surrounding white background and incorporates it into the visual perception. The following illusion presents a question: are the circles in motion or stationary?

Despite the lack of animation, this is an example of a peripheral drift illusion, which causes still images to appear as if they are moving when fixated upon without blinking. Now, can you determine the number of black dots in this image? Although there are 12 dots, they cannot all be seen simultaneously due to the limitations of peripheral vision.

This deficiency becomes apparent when attempting tasks such as this. What do you perceive in this image? If you believe there are lines and a light blue circle in the center, you are mistaken. The background is entirely white, and the non-existent light blue circle is a result of the brain adding colour to the negative spaces.

Similarly, in the next illusion, what colors do you see in these peculiar shades? Just like the previous illusion, these shades are empty and white. This is known as the watercolour illusion, where the brain fills in the shape that has a bright line and a darker line at its borders with a brighter colour. Now, can you determine if this image is three-dimensional?

In reality, it is perfectly flat. The white shade in the middle creates the illusion of a bulge. If you move closer, you will notice the luminosity spreading. The task here is simple: follow this spiral from the beginning to the end. However, this spiral is not actually a spiral; it is composed of concentric circles.

The brain fills in the gaps due to confusion caused by the intricate background. Can you identify which rectangles are darker? Surprisingly, the rectangles under columns A and B are the exact same color. The surrounding black and white bars deceive the perception, making column A appear significantly darker.

Lastly, can you find the correct shadow for this amusing couple? No, it is this one. Only one of the locks is unlocked. Well done! This drawing is missing one piece.