Re: Sports and 3d

[P3D Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Sat, 23 Aug 1997
>From: P3D Dr. George A. Themelis ............
>
>I have documented two cases of people with apparent lack of 
>stereopsis.  One is Kathy, an 19 old girl who has failed all my 
>stereopsis tests but still likes my stereo pictures.  She has good 
>vision in both eyes, is generally healthy, drives a car :-) and she 
>is not aware that she is missing anything.

*****  It's obvious she functions in a 3D world. So what is it she likes
about your pictures? Which eye does she see them with? How do you know she
doesn't see stereopsis? Maybe she doesn't recognize what it is, but does
have it? If she uses both eyes to see with, and she has both eyes looking at
the same scene, they recieve visual information that contains stereopsis. If
she isn't processing that information for some reason that's one problem,
but stereopsis is still there and your description makes it sound like she
does have stereoscopic vision.

>
>The other is my friend Howard who knows that he has a problem with
>one eye.  Apparently one eye is dominating his vision.  He has
>failed my stereopsis tests and he does not show any appreciation
>for stereo photography.  He used to wear glasses, now he wears
>contacts.  The interesting thing about Howard is that he is a
>great basketball player.  Now, wouldn't you expect stereopsis to
>be very important in basketball?

*****  Yes I would expect that. I would also expect that his compensation
mechanism has had a while to optimize. I have good stereo vision but I can't
play basketball very well!

>..................
>If Howard can be an excellent racquetball player, I am sure he
>is having no problem driving a car.

*****  Proof that sight is in the mind, not just in the eyes.

(rekated to this subject was Jim Crowell's comment).......................
>This is kind of interesting, because the only test found so far that _does_
>correlate with accident rate (I think it was around r=.2, maybe a bit
>lower) was a test of the cognitive ability to divide attention, i.e. to
>perform two tasks simultaneously in different parts of the visual field.
>

Makes sense to me.
Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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