Re: Driving and 3d

[P3D Dr. George A. Themelis <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

>>Have you even experienced lack of stereopsis
>>with both your healthy eyes wide open?  
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

>just close one eye while driving. 

I asked about having both eyes open, on purpose.  I tend to believe
that TEMPORARILY closing one eye is a poor imitation of not having 
stereopsis FOR YOUR ENTIRE LIFE.

>*****  If one does *not* have stereopsis functionality, that is a
>significant amount of less information available to the driver. 

Information that the driver needs while he/she is driving?

Because I have not experienced lack of stereopsis with both eyes
open, I cannot speak for the effects of this deficiency during
driving... But logic suggests that since most objects are beyond
20 feet and everything is in constant motion (motion parallax
is experienced without stereopsis, correct?) lack of stereopsis
would not be missed...

>Mostly I watched stereopsis in action, motion parallax, perspective 
>changes with distance and exercised the ability to judge distances 
>and rates of travel between my car and the other vehicles on the road. 

Note that motion parallax and perspective changes are exactly the
cues that a person without stereopsis will use while driving.
And I think that these are mostly used even by a person with
stereopsis.

At this point an expert in the field could perhaps help us 
resolve this argument.  Jim C. perhaps?

George Themelis


------------------------------