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Posted by Denied:
Its crazy, things get larger and change shape, all be it, for only a few seconds.
The image above should (hopefully) flicker wildly. Now move your finger along it from left to right, with a speed such that you travel the distance in about 3 seconds, while following the finger with your gaze. When you hit the right speed, you should perceive a smooth rightwards motion of the stripes. Now move your finger back. If you follow it again with your eyes, you will see smooth leftwards motion of the stripes! After a little practice, you can voluntarily switch movement direction without your finger as a guiding target.
The stimulus is just a rapid phase reversal (at 30 rev/s) of a bar pattern. The occasional jerks are due to aliasing of the reversal frequency by the raster frequency of your display and would not occur if I could synchronize to your screen build-up.
Originally posted by Denied
Found another weird one, run your finger across this flashing bar, with about a 3 second distance between each swipe.
Soon it feels like your finger is also directing the parallel lines in time with your finger.
Now take away your finger and for a few swipes, you can change the direction with out your fingers.
Originally posted by Arcane Demesne
Originally posted by Denied
Found another weird one, run your finger across this flashing bar, with about a 3 second distance between each swipe.
Soon it feels like your finger is also directing the parallel lines in time with your finger.
Now take away your finger and for a few swipes, you can change the direction with out your fingers.
I used to do that w/ my fan! Well, I didn't use my hands, but I stared at my fan while laying in bed, and eventually, I was able to follow one of the blades go round-n-round. I wonder when we'll eventually evolve quicker eyesight, and see maybe 80-100 frames a sec, rather than the standard 20-30.