Optical Illusions - Continued...

Simultaneous Contrast

Which center square is the brightest? A gray square appears brighter or darker depending on its contrast with its background.

Small, Smaller, Smallest

Of the three squares, which is the smallest? Actually they are the same size!

Springer Illusion

Do you see diagonal lines? A pattern of dots creates faint diagonal lines.

Stroop Effect

In what ink colors are these words printed? When people are asked to name the colors of the ink in which the words are printed, their performance is slowed considerably if the words themselves are the names of other colors.

Square Size

Is one of these two areas slightly larger than the other one? No, they are both the same, even though the white looks larger.

Squaring Off

Notice how the rings around the square make the sides of the square appear as though they are bent inwards

Trick Tracks

Which of the two horizontal lines is longer? It looks as if the top one is longer, but are you sure? Actually they both the same length!

Tricky Tubing

Where does the center prong come from? Whichever way you look at it, this is an impossible object.

Whoa, Horsey!

Do you see a lot of black dots, or do you see a man on a horse? Look again!

Zollner Illusion

Are the lines slanted back toward the horizon? Parallel lines that are interrupted by a crossing line appear to be tilted away.