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Rotating Rings – If you stare at the dot in the center and move your head away from the screen the rings will start to rotate. Now gradually get closer again…they change direction! |
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Hermann Grid – This is a classic optical illusion named after Ludimar Hermann who discovered it in 1870. At every point where the white lines intersect our eyes perceive a gray, shadowy blob. If you look directly at one of the intersections though, the blob disappears. |
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Fading Image – Stare at the image for about half a minute without moving your eyes and watch as it gradually disappears. This is a variation of Troxler’s effect which essentially says that if you fixate your eyes on a certain point, stimuli near that point will gradually fade. |
source: list25.com
