If this doesn’t mess up your mind, I don’t know what will.
To interpret certain visual images the brain has to resolve ambiguities. And in doing so it uses all sorts of assumptions, built in assumptions about what you know about the world. Because the brain uses these assumptions to rationalize what is seen the rational mind can be tricked. This is the basis of all visual illusions. The assumptions are so strong that the mind actually overrides what is actually seen. Here are a few of the classic visual illusions
Look from left to right from top to bottom.
The rod in the middle does not exist.
How many, 7 or 10? Count at the top and then at the bottom.
The dark caps make this drawing confusing to the brain.
An open door to the inside or outside?
Perspective suggests what the mind registers.
Round or square?
Details change how the mind makes assumptions.
How many, 3 or 4?
Light and shadows trick the mind.
Is this just one?
Non parallel lines change what the mind perceives.
A rare construction.
Forced perspective from two different points.
The center beam disappears, look from left to right.
Another use of shading for the mind to sort out.
2 or 3 posts?
Another use of caps to force an assumption.
Count them, 12 or 13 figures?
If you watch closely you may be able to notice that the thirteenth figure is made up up of small segments taken from each of the twelve original figures as the drawings are moved.
The same cognizant ambiguities also enable almost everyone to be able to read the following:
S33 1F U C4N R34D 7H15.
7H15 M3554G3 53RV35 7O PR0V3 H0W 0UR M1ND5 C4N D0 4M4Z1NG
7H1NG5! 1MPR3551V3 7H1NG5! 1N 7H3 B3G1NN1NG 17 WA5 H4RD
BU7 N0W, BY 7H15 LIN3 Y0UR M1ND 1S R34D1NG 4U70M471C4LLY
W17H 0U7 3V3N 7H1NK1NG 4B0U7 17.
0NLY C3R741N P30PL3
in what oerdr the ltteres
in a word are, the olny iproamtnt tihng
is that the frsit and last ltteer be in the rghit pclae. The rset can be a
taotl mses and you can still raed it whotuit a pboerlm. This is bcuseae
the huamn mnid deos not raed ervey lteter by istlef, but the whole word.
I’m not sure what to make of all this, but I think I need new glasses!