[photo-3d] Re: pulfrich "stereo base"

[Jim Crowell <jcrowell@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

> Sergio writes:
>> How long is the delay between cone vision and rods vision?
>> Sergio
> 
> Long enough to cause stereopsis. ;-)
> 

Actually, the rods are not typically involved in the Pulfrich effect; the
glasses aren't nearly dark enough for that.

Two ways to tell if you're in a rod-dominated regime: (1) you can't see
colors, and (2) you can actually see things better by looking a bit to one
side, as there are either few or no rods in the central retina (needless to
say, this is not helpful for stereo).

-Jim C.

-------------------------------------
Jim Crowell, Ph.D.
Dept. of Psychology
Cognitive/Experimental Group
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Ohio State University
Columbus, OH 43210
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