Optical illusion - can you see all 12 black dots at once?

I listened to a fantastic Great Course recently called “The Secrets of Human Perception” that explained visual quirks like this(and other fascinating aspects of the human sensory system) in great detail. The instructor had a lot say about this particular effect, I’m sure.

I’m pretty sure, anyway. Honestly I don’t remember much other than the title. I’m assuming all the knowledge I gained from these lectures will reveal itself during trivia night at my local bar.

2 Likes