[photo-3d] Re: focus and convergence again

["Chuck Holzner" <cfholzner@xxxxxxxx>]

> 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?