vendredi 11 mai 2012

Peripheral Drift Illusion

Akiyoshi Kitaoka's "Rotating Snakes" illusion:

In its usual presentation, the image consists of concentric circles of stepwise luminance gradients with curved edges, which produces a strong illusion of rotation in most observers.

This type of illusion, often called a peripheral drift illusion, was thought to occur due to slow drifting eye movements but a new study suggests that it is more likely to be explained by rapid but tiny eye movements ("transient oculomotor events") called saccades.

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