[photo-3d] Re: Bothersome Dissolve or Projection in general???

["Howard Wade" <HWADE@xxxxxxxx>]

I'm way behind on my P3D reading, but this one really caught my 
attention. My wife and I spent a lot of time in the Stereo Theater at 
Mesa, and by Sunday she had developed a screaming headache that 
lasted for at least the next three days. There was plenty of 
dissolving going on, but it was also a more intensive 3-D viewing 
experience than she had experienced before. Her doctor thought the 
problem was in the polarizing/depolarizing process that occurs in 
projection. I'll ask him for more details on his theory and report 
back.

Howard (Never got a 3-D Headache Myself) Wade
hwade@xxxxxxxx

--- In photo-3d@xxxxxxxxxxx, "Dr. George A. Themelis" <drt-3d@xxxx> 
wrote:
> Regarding the case of Brian's wife developing a splitting
> headache during a stereo dissolve presentation, I have to
> say that I have encountered cases of people developing
> a headache in stereo presentation in general (not dissolve).
> 
> In particular, I remember during a presentation using a
> TDC projector of perfectly aligned images (of course!)
> someone got up and left.  Later he told me that he
> developed a headache and could not stand it any more.
> I have heard of a couple of isolated cases like this.
> 
> We discussed this a few years ago.  No one has a clear
> understanding why this happens to certain people.  Perhaps
> there are varying degrees of enjoyment and tolerance of 
> stereo images presentation.
> 
> Brian, does your wife enjoy stereo projection in general,
> or not?
> 
> After judging Detroit today for 4 straight hours (with a
> total 4 hour of sleep the night before) I must say I had
> almost reached the end of my rope... I said ALMOST!  It
> will take a few more hours of misaligned stereo slides
> to do it to me!!!
> 
> George