10. Endless Staircase
This is a variation of the endless staircase optical illusion constructed out of legos. Like the the blivet, this is also an impossible object and is sometimes called the “Penrose triangle”.
11.Zöllner Illusion (Parallel or diagonal)
Philosophers have also been interested in what illusions like the Zöllner Illusion can tell us about the nature of experience. For example, in the case of experiencing the Zöllner Illusion, it would seem to be that the one can know that the lines are parallel whilst at the same time one experiences them as unparallel. If so, then this might count against the claim the perceptual states are belief-like, because if perceptual states were belief like then, when experiencing the Zöllner one would simultaneously believe that the lines were, and were not, parallel. This would seem to entail that one was being irrational, because one would simultaneously be holding contradictory beliefs. But it seems highly implausible that one is being irrational just in virtue of under going this illusion. For discussion of this general point about whether perceptions are like beliefs,
12.Hering Illusion (straight or curve)
This optical illusion was named after Johann Karl Friedrich Zöllner and consists of parallel lines that appear to be diagonal. You may need a ruler for this one.
13.Titchener Circles (which is bigger)
although the two red lines seem to be bowed outwards they are perfectly straight and parallel. This optical illusion is attributed to Ewald Hering, a German physiologist who believed that the distortion was derived from the mind overestimating the angles at the points of intersection.
Also known as the Ebbinghaus Illusion, there is still a debate in psychological circles as to the exact mechanism and implication of this effect. Essentially, the orange circle on the left appears to be smaller than the one on the right although in reality they are the same size.
Yet again we have an example of an impossible object except this time it’s the rotation of the blocks that is inconsistent. Are they side by side or on top of each other? Maybe that why they call them indecipherable figures.
15. Up and Down
At first this optical illusion picture may be hard to see, but if you begin to scan back and forth across the image you will notice that the squares in your periphery begin to rotate. As soon as your eyes stop moving, however, rotation will cease.
17. Static Motion
No, this is not an optical illusions GIF. The image really is static. Notice that when you look at any individual point dead on, it will stop moving. This powerful optical illusion is derived from interacting color contrasts and shape positions within the image.
18. Lilac Chaser
Also known as the pac-man illusion, if you stare at the center cross for a couple seconds you will begin to perceive a green disco going around the circle of magenta discs. After a few more seconds the magenta discs will gradually begin to fade away until all you see is a green disc going in a circle around the cross (if you’re having trouble seeing this optical illusion move closer to the screen).
19. cafe illusion
Another famous optical illusion, this one was recently rediscovered in a cafe wall at the bottom of St. Michael’s Hill. Although the lines appear to be diverging from one another they are in fact quite parallel.
20. Checker Shadow Illusion
Probably one of the most unbelievable illusions out there, this one was first optical illusions pictures published by Edward Adelson, a professor at MIT. Although the square labeled “A” appears to be darker than the square labeled “B”, they are actually exactly the same shade of gray. It’s okay if you don’t believe it, we didn’t either, but Photoshop proved us wrong.
21. Floating Stairs
For centuries artists have been pushing our perceptual limits and if you ever get lucky enough, from the right angle, you may just catch a glimpse into the practical artistic applications of optical illusions and the way our mind interprets them.
22. Spinning Silhouette
Created by web designer Nobuyuki Kayahara, some people at first see the figure spinning clockwise while others see it spinning counterclockwise. Don’t spend too much time trying to decipher it though, you could be here all day.
22.Shepard’s Tables (size)
When you look at the two tables above, do they appear very different in size and shape? Would you believe that the two tabletops are exactly the same? If not, check out this animated illustration to see for yourself.
First presented by American psychologist Roger Shepard in his book Mind Sights (1990), this simple yet astonishing visual illusion is further proof that our vision system is largely influenced by our experiences with the outside world and therefore interferes with reality sometimes.
In this illusion, the perceptual error was caused by the fact that our brain couldn’t help but make a 3D interpretation of the 2D pictures, and perceive very different sizes because of perspective foreshortening: The closer the object is in distance, the larger it is on our retina.
23.Younge lady or Old woman
“My Wife and My Mother-in-Law” is arguably one of the most famous optical illusions in the world. Some people see a young lady with her head turned towards the background while others see an elderly woman’s side profile.
A 2018 study from Flinders University in Australia says that who you see in the image depends on your age. Psychology professors at the university had 393 participants ranging in age from 18 to 68 who were shown the image for only half a second. The younger participants saw the young lady while older participants saw the elderly woman.
“The results therefore demonstrate that high-level social group processes have a subconscious effect on the early stages of face processing,” the study’s authors note.