The stereogram examined in this observationpic.twitter.com/r02ocKZsF6
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Which method do you use when you see stereograms without any aid?
Are the eyes for this person actually tracking correctly and parallel?
It's possible get an extended sigh test for such issues and are often recommended for those with dyslexia etc 
He saw it correctly.
I use both crossed/uncrossed and see 4 squares with in the second and third a circle in front or behind the square, depending on the method used.
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