Re: KEYSTONE OPTHALMIC TELE-BINOCULAR

[P3D Van Beydler <vbeydler@xxxxxxxxxxxx>]

Thanks to David Kazdan M.D. for the following info about the KEYSTONE
OPTHALMIC TELE-BINOCULAR question i recently posted on photo 3-d.  
"There was a device something like what you describe used for pilot
screening by the Army Air Force during WWII.  It shows up in one of the
Clark Gable flying movies; in the end, my understanding is that it was
never demonstrated to verify much about a pilot's vision.

I have another Keystone ophthalmic device, a stereo viewer designed for
prescription sales for eye excercise.  I don't see that it's any different
from any other stereo viewer (and I use it for my own stereo pairs) but it
has a very serious booklet for loggin exercises and the pictures included
with it are designed for some sort of specific eyeball action.  It's a neat
old beast.

I can't post to the listserver for some obscure reason (my local machine
adds a routine direction to outgoing mail that the servers won't accept, I
have the same problem on other groups); post this if you think it's off
interest.

David:There was a device something like what you describe used for pilot
screening by the Army Air Force during WWII.  It shows up in one of the
Clark Gable flying movies; in the end, my understanding is that it was
never demonstrated to verify much about a pilot's vision.

I have another Keystone ophthalmic device, a stereo viewer designed for
prescription sales for eye excercise.  I don't see that it's any different
from any other stereo viewer (and I use it for my own stereo pairs) but it
has a very serious booklet for loggin exercises and the pictures included
with it are designed for some sort of specific eyeball action.  It's a neat
old beast.

I can't post to the listserver for some obscure reason (my local machine
adds a routine direction to outgoing mail that the servers won't accept, I
have the same problem on other groups); post this if you think it's off
interest.

David"

Anyone else with any history on this item?  

thanks

van beydler


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