P3D Exotropia and stereo

[Mark Langenfeld <mlangen@xxxxxxxxxx>]

I'm new to the list, so will apologize in advance if this thread has been
beaten to death here before.

I suffer from a chronic visual condition called exotropia (more commonly
known as "lazy eye"). Exotropia is marked by the lazy eye deviating
outward (mine also deviates slightly upward), as opposed to inward
(diplopia) in the cross-eyed individual. I have been pretty thoroughly
examined in connection with obtaining a waiver for an aviation medical
certificate, and the findings were essentially: (a) I look out of one eye
at a time ("alternating") to avoid double vision; and (b) I should
not be able to achieve image fusion. 

But I have just recently discovered that everything from View-Masters to
antique parlor stereoscopes give me splendid 3D results. (Interestingly, a
co-worker also afflicted with "lazy eye" also tells me he gets good
results with a V-M). This was a startling discovery for me, bordering on a
visual epiphany. Needless to say, I am smitten.

Does anyone have a good eplanation for how and why someone supposedly
without binocular vision can find himself so thoroughly enjoying the 3D
world?

Regards,

Mark


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