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Re: [photo-3d] Re: focus and convergence again
- From: "John A. Rupkalvis" <stereoscope@xxxxxxxxxxxxx>
- Subject: Re: [photo-3d] Re: focus and convergence again
- Date: Sat, 14 Oct 2000 12:26:21 -0700
As I pointed out previously, headaches are almost always a result of
eyestrain.
There are two common (way too common) causes of eyestrain: misregistration
(vertical, or rotational) and excessive parallax.
JR
----- Original Message -----
From: "Chuck Holzner" <cfholzner@xxxxxxxx>
To: <photo-3d@xxxxxxxxxxx>
Sent: Saturday, October 14, 2000 11:53 AM
Subject: [photo-3d] Re: focus and convergence again
> > Whether you can or cannot focus on something is a different
> function than
> > that of convergence. I have already pointed out several instances
> where one
> > function is performed independent of the other.
> >
> > Stereoscopic viewing (viewer, projected, holographic, lenticular,
> free-view,
> > whatever) is dependent on this ability to focus and converge at
> different
> > distances, and millions of people do it all the time.
> >
> > JR
>
>
> And those who find it difficult get Headaches.
>
> Chuck
>
> How many million?
>
>
>
>
>
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