blacks Try to count the points ...
Negen Blog
fixing this grid you will see many gray dots flashing between the intersections of the lines, except where you are watching. These dots move in relation to the movement of your eyes, and disappear when they are fixed, and reappear when you look away.
EXPLANATION: When you look at something, the way most of your view of the sensors in that direction. So what are you staring directly is not seen with lower resolution, more confused. For this our brain combines the colors away from the point that we focus, showing a gray dots apologize (mixture of white and black).
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