[photo-3d] Re: Chromostereopsis

[mramstad@xxxxxxxxxx]

This thread has been very educational for me.  I had
always assumed that our eyes have achromatic lenses.
Now I realize that if that were the case, the lenses
would not be able to correct for achromatic aberration
at all focusing distances.  Now I guess that our brains
must be able to correct for varying amounts of chromatic
aberration.

If that's the case, my question is does our brain 
(or optical nerves) attempt to correct for chromatic 
aberrations locally in the field view?  The reason I ask 
is that while viewing Shab's figure #5 through my 
favorite stereoscope, the change in perceived depth of
the red and blue lettering is easy to pick out, but it is
hard to determine whether any of the other colors are
shifted in depth.  Also it is hard to notice any color 
separation around the white features.  Are our brains
canceling out the chromatic aberration everywhere except
at the borders of the very pure blues and reds?  

Dr. Monte Ramstad
507-263-4611
www.pokescope.com