The thing that is so interesting about this optical illusion is the way it “fixes itself” with a slight movement of each row on the checkerboard. If it is a quarter of an inch off it looks bent. Move it a quarter of an inch and it isn’t: So how does this optical illusion work? [...]

Here is a great demonstration of the size illusion caused by perspective: It is related to the Moon illusion, as demonstrated by the animated diagram on this page: Why does the moon look so much bigger when it is near the horizon The illusion has practical effects – it is something that architects think about [...]

The thing that is so surprising is the AMOUNT of bending that this illusion creates: So how does this illusion work? It is a variation on the “Hering illusion”, which you can see demonstrated on this page: The standard Hering illusion (1861) If you look at this page you can see one aspect of the [...]

The video is entitled “Amazing Animated Optical Illusions!”, and they are amazing. With a static image and a movable grating, you can create simple animations: This book is mentioned in the video’s description: Magic Moving Images There is a series of children’s books that takes advantage of the technique. The book Gallop! is seen here: [...]

Watch the video – this illusion will blow your mind: How does this optical illusion work? The first thing to understand is that ALL of the diamonds on the sheet of paper, as well as the hand-held diamond, are identical. That seems impossible, but it is true. The key is that the diamonds are shaded [...]

Here is an optical illusion that inserts color: Look at the dot So what is happening here to create the false color? You may have noticed that if you stare at a bright light and then look away, it will create a dark spot in your vision for a few seconds. Similarly, if you stare [...]

Optical illusion #1: Optical illusion #2 – Keep in mind when you look at this that you are really looking at four normal, concentric circles: Four perfectly round circles You may have to print it out and draw on it with different colors to prove that to yourself. See also: – A most impressive optical [...]