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Re: AR Sickness/Blink rate

On Thu, 7 Aug 2003,  wrote:
> I had a few people using AR the other day and some complained they where
> feeling sick or they had forgot to blink, I wondered if anyone had
> experienced the same effects. It maight be binocular rivalry and also
> the swapping focal distances, but their was no registration of overlayed
> objects on the display to objects in the real world like Tinmith/MARS
> style. Could be loads of factors

Hmm, I'm not sure about the binocular rivalry; I was getting "pricking" in
my eye when I tried your HMD and I think I'd ascribe it more to the
"rabbit in headlights" forgetting to blink issue.  As a I child I had what
I was told was "alternating vision"; effectively two lazy eyes that would
wander when I was concentrating on something else or tired.  This means
that I supposedly didn't have very good binocular vision or depth
perception (though of course I don't know what it was supposed to be like,
having never had it!) and neither of my eyes was dominant.  These days 
they don't wander so much so its not noticable but as I never had the 
corrective surgery I assume its still there.  Unless having the display 
hanging in front of one eye is causing the brain to force a new dominant 
eye, I doubt it would be effecting my binocular vision as much as it would 
on a "normal" person.  But then again, I'm a techie, not an optician.

Jim'll (the abnormal person :-) )

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