By David Ponce
Well the above is pretty self explanatory, just look at it and you should see it pulsating somewhat. Click on it for a larger version and stronger effect.
We’re not sure what’s causing the illusion, but suspect it has something to do with your eyes’ microsaccades, the small, jerk-like, involuntary eye movements we all experience but usually don’t notice.
its really pulsating when you look at it for long. . .