RE: art and freeviewing sausages

[P3D Jim Crowell <crowell@xxxxxxxxxxxxxxx>]

At 23:50 9/18/96, P3D Kevin Evans wrote:
>
>I find that cross-eyed viewing of stereopairs on a computer monitor makes
>for smaller images because the ray path is slightly longer.

Actually this has less to do with the ray path than it does with the
vergence posture of your eyes.  Your eyes are converged at a very near
distance (probably less than half the distance to the screen) & your brain
takes account of that fact in attributing a physical size to your retinal
images (i.e. the objects are close so they must be small).  The phenomenon
is called vergence micropsia (discussed 2 or 3 months ago).

-Jim C.

----------------------
Jim Crowell
Division of Biology
216-76
Caltech
Pasadena, CA
(818) 395-8337
jim@xxxxxxxxxxxxxxx



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