[robwwilliams]

Yes, a bit slow to load but worth it. Ten videos of visual system illusion that work well.

The last illusion “Phantom Wiggle” is probably caused by time base differences of rods and cone photoreceptor systems.

The wiggle and movement of the strobed light is caused by ineffective calibrated of the bright and fast neural signals relative to the darker and slow (mesopic) signals of the large surrounding field of vision.

Timing differences between retinal subsystems (rods and cones mainly) are misinterpreted as movement.

Easy to see (expose) this temporal-spatial error effect between the slow rod photoreceptor system and the fast cone system.

Here is how: Just after dusk look at a bright light or even a star low on the horizon that ALSO happens to be near the trunk of a dark tree. Close one eye and then look at the bright light while gently rocking the corner of your open eye back and forth with your finger. The light and tree trunk will move relative to each other. In fact, the light may appear in the tree trunk. Time and space are also relative in the brain.

The brain has no clock or oscillator and has to create its own unifying timing system. The near-synchronization among brain subsystems is a key role of the thalmo-cortico-thalamuc feedback loop (imho).

[kevin_thibedeau]

You can induce the phantom wiggle by looking at a matrix scanned 7-segment display and making motorboat sounds that vibrate your head.

[hiptobecubic]

I remember discovering this phantom wiggle when looking at LED clocks as a kid. Look at an old clock (or microwave) and vibrate either it or you (hum) at various speeds.