One eye blurry?

Do you ever get this article were one of your eye seem to get a bit blurry or something, It pass after awhile or after sleep but what the heck is it cause I don't know how to explain it anymore

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Answers:    Maybe your eyes don't own the exact same vision, for example possibly one is 20/20 and the other one is slightly less than that... so perchance you don't normally become aware of it but when your eyes get tired the one eye get blurry. Then after you sleep it gets rested and spinal column to normal.
Just an notion..

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