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Richard:  thanks for the links -   Although you can see a related EEG  
(by following the links), I still don't have a clue as to what is  
going on....guess I need to do a little more research....

I'm still not sure if it has to do with Pulfrich or not - if you go  
to the wikipedia link http://tinyurl.com/2rz4va, all the references  
require a darkened lens over one eye.  It would appear the effect is  
physiological and has to do with retinal stimulation correlated to  
visual cortex processing time.

	




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