
Perhaps avert your eyes if you find such
optical effects to be headache or vertigo inducing, but Jacques Ninio’s classic
Extinction Illusion has twelve fleeting dots on the grid that
dash away when you try to focus on them is really worth a spare moment or two. Hardly anyone can see all the dots at once due to poor peripheral vision and the mind’s eye tends to generate solid crossings over the
scintillating, contrasting gaps. I wonder how someone manages to design an optical illusion that’s meant to be evasive and dazzling in the first place.