P3D Re: Dark Vergence & Cross-viewing

[fj834@xxxxxxxxxxxxxxxxxxxxx (Dr. George A. Themelis)]

Thanks Linda and Andrew for pointing this out... I have noticed it with
my eyes too.  I have a litle bit "exophoria" I think...

>This is certainly true in my personal experience. I have "exophoria"
>meaning my eyes tend to wander "out" if one of my eyes is blocked, for
>example if I am sitting behind someone at a theatre and I can only see
>with one eye, the other eye loses its "fixation". It feels weird.
>Anyway, I find that I can easily parallel view but I can't cross view at
>all because my eyes just won't do it! 

I don't understand what you mean by your eyes won't do it Linda.
Your eyes will converge, right?  If they converge to a close-by
point where their extention at the place of the image will be at
the left image for the right image and the right image for the left
eye, what is the obstacle in cross viewing?  Does your conscentration
break when you try to make the jump in attention from the close-by
object to the sereo image?  Don't your eyes "lock" or fuse the image?
Have you practiced the recommended excercises to cross viewing?
Can you corss your eyes at will?

-- George Themelis


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