Optical Illusions

waves
Image Credit: This image is believed to be in the public domain.
This optical illusion is a static image of a green background with a series of blue dots, however when you look at it the whole thing appears to move and warp in a wave-like fashion.

shelves
Image Credit: This image is believed to be in the public domain.
This classic illusion consists of a series of shelves attached to a wall, but how many shelves are there? Try counting them from the left and then from the right, are they the same?

bulging
Image Credit: This image is believed to be in the public domain.
This black and white grid appears to bulge outwards in a circular form despite the fact that it is made up entirely of squares. The black square in the center represents the point that appears to be closest to your eyes.

floatingcircle
Image Credit: This image is believed to be in the public domain.
The circle in the middle of this picture looks as though its floating above the background. The blurring on the pattern of the circle creates the illusion that it is closer to your eyes than the background.

crazycrate
Image Credit: This image is believed to be in the public domain.
Here is a completely impossible wooden crate, another take on the classic impossible triangle illusion.