The pattern contains 16 circles, but if you’re like most first-time viewers, you’re thinking, Circles? What on earth are you talking about? I can only see a bunch of rectangles!
Okay, just trust us on this one. Look again, and 16 beautifully round circles, lodged in between the “door panels”, will pop into view in no time.
How long did it take for you to see the circles? Let us know in the Comments!
The views expressed are those of the author(s) and are not necessarily those of Scientific American.
ABOUT THE AUTHOR(S)
Susana Martinez-Conde is a professor of opthalmology, neurology, and physiology and pharmacology at SUNY Downstate Medical Center in Brooklyn, N.Y. She is author of the Prisma Prize-winning Sleights of Mind, along with Stephen L. Macknik and Sandra Blakeslee. Their forthcoming book, Champions of Illusion, will be published by Scientific American/Farrar, Straus and Giroux.