This Illusion Knows When You Are Looking At It

(Slate::Bad Astronomy) – Phil Plait:

This illusion is called the scintillating grid. At the places where the gray alleys intersect, small white circles are inserted, just touching the corners of the black tiles.

As you move your gaze around, small black circles seem to appear and disappear in the white circles everywhere except right where you’re looking, as if they know where you’re gazing. It makes the grid look like it’s flashing, or scintillating. It’s bizarre. …

bad_astronomy 2016/09/13 optical_illusion

Scintillating grid illusion

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