Hermann Grid Illusion

Do you see gray dots at the intersections of the white lines?

Hermann grid illusion: There are not gray dots in this grid. However “ghost like” gray blobs are perceived at the intersections of the white lines. The gray dots disappear when looking directly at an intersection. This illusion can be explained by a neural process happening in the visual system called lateral inhibition (the capacity of an active neuron to reduce the activity of its neighbors).

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