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From: jwl@ernie.Berkeley.EDU (James Wilbur Lewis)
Newsgroups: comp.graphics
Subject: Re: 3-D perceptual abilities
Keywords: TV 3-D graphic
Message-ID: <27798@ucbvax.BERKELEY.EDU>
Date: 28 Jan 89 23:17:23 GMT
References: <6382@thorin.cs.unc.edu> <25652@sgi.SGI.COM> <985@wasatch.UUCP>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: jwl@ernie.Berkeley.EDU.UUCP (James Wilbur Lewis)
Organization: University of California, Berkeley
Lines: 16

In article <985@wasatch.UUCP> u-jmolse%sunset.utah.edu.UUCP@wasatch.UUCP (John M. Olsen) writes:
-In article <25652@sgi.SGI.COM> thant@horus.SGI.COM (Thant Tessman) writes:
-
->It mentions that stereo viewing devices don't work on about
->eight percent of the population.
-
-Does it follow that this 8% also lacks depth perception under normal
-conditions?  Say, driving down the freeway?  Now that's a spooky thought.

No, it doesn't follow  --  binocular stereo is only one of many cues
used by the visual system for depth perception.  Close one eye -- does
the world look flat now?  No -- you still have parallax, motion, and
size constancy cues to give you a fairly good 3-D percept.

-- Jim Lewis
   U.C. Berkeley