Category Archives: optical illusion

The Coffer illusion

Okay, look at the photo of the door below. Time yourself from the start to see how long it takes you to find the circles. How many circles do you see? Do you see any? There are sixteen circles. Do you see them? If you don’t, and for an explanation, go to the next page […]

Wednesday: Hili dialogue

Good morning on Wednesday, May 17, 2017: exactly one week till I engage Le Dawkins in conversation in Washington, D.C. Be there or be square! Also, today the Certified Hand Therapist will inspect my finger to see if the tendon has healed enough that I can discard the damn plastic cast I’ve been wearing for six […]

A traveling-bar illusion

Matthew, who loves illusions, sent me this tw**t: Reality shatter. The two objects are traveling in exactly the same manner. Watch when it turns gray. pic.twitter.com/HpZsudeXSG — Cliff Pickover (@pickover) June 18, 2016 Now an explanation for this is published here (it’s based, as you might expect, on differences in contrast), but I can’t be arsed […]

Monday: Hili dialogue

It’s September 12, 2016, and National Chocolate Milkshake Day.  Do they have real milkshakes (with ice cream) in the UK—except at American nostalgia joints? And while I’m on the subject, I always thought that someone could make a pile of money in Great Britain if they opened a shop selling real hoagie sandwiches (not the Subway brand) […]

Ten prize-winning illusions

For some reason those of us here at WEIT—well, at least Matthew and I—are fascinated by optical illusions, crypsis, and other things that fool the eye. Well, we now have the Motherlode of Illusions: the ten 2016 finalists for Best Illusion of the Year Contest from the Neural Correlate Society.  You can see them all at […]

Optical illusion sculptures

These eye-fooling sculptures are made by Japanese professor Kokichi Sugihara; they’re like 3-dimension Escher creations: h/t: Taskin

You won’t believe these 3-D illusions!

Just to wake you up with clickbait, and to please Matthew, who loves optical illusions, here are three flat things that look like 3-dimensional things. (You can see more at Distractify).

An optical illusion anyone can make

I’m just posting this on this cold morning because, when I visited the nearby coffee-and-bagel shop (Einstein’s) in the student union, I found a stack of those cardboard cup-holders designed to prevent you from burning your hands and suing the shop. I took two of them for the photos below. I seem to remember that Matthew put […]

Behold: the amazing Jastrow illusion (and the amazing Dr Jastrow)

by Matthew Cobb The Jastrow illusion blows my damn mind https://t.co/GPKy3EbkQP pic.twitter.com/cfKMRQCTE1 — Kyle Hill (@Sci_Phile) February 22, 2016 Click on the arrow to watch it work. According to Greg Mayer’s favourite source, Wikipedia, this illusion was discovered by the American psychologist Joseph Jastrow (1863-1944) in 1889, when he was only 26 (some sources say […]

Monday: Hili dialogue plus optical lagniappe

It’s not only the beginning of the week, but also the first day of February, with Spring creeping up slowly upon us. No snow is predicted in Chicago this week, so we’ve had a very warm winter— thanks to China and the Koch brothers. On this day in history, Russia adopted the Gregorian calendar in […]