optical illusions
The Forever Corridor Illusion
Check out this illusory gif. If you want the illusion to go faster, cover the middle section. If you want the illusion to go slower, cover the sides.
Ambiguous Figures: 19 Heads or More
How many heads can you see in this ambiguous figure drawing? I can count 19, but there may be more depending on what you call a head.
Dark Spiral Illusion
Here’s a beautiful spiral illusion. As the pattern spins in this gif, you can feel yourself sink into the spiral. The spiral aftereffect is also strong! Here’s what the graphic looks like when it’s not spinning:
The Spiral Aftereffect
Here is an incredible example of The Spiral Aftereffect. Watch the spinning, moving gif below. Then look at a strong stationary pattern nearby. Watch that spin and bubble and move as well. That’s the spiral aftereffect.
The Spiral Tornado Illusion
The Spiral Tornado Illusion — Look at this spinning tornado for a few minutes and then look away at a strong pattern. Watch the pattern twirl and buzz! This is known as the spiral aftereffect. Also, check out this larger version. It also works very effectively.
The Circle Illusion
The Circle Illusion: How many circles do you see in the above graphic? You can leave your answer in the comments below.
The Spinning Balls Illusion
The Spinning Balls Illusion is an incredibly effective optical illusion where the balls seem to spin around the circles. Note that the illusion is stronger with this larger image.