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No, but it's not the same thing because the words on the page are at the same distance from the eye, so there's no parallax.
But with FS focus, my left eye is dominant because the FS is a nearby object. Parallax causes extra tgt images, which are in the range of my right eye that is dominant for far objects, and of the RS which is in the range of my near-sighted left eye that is dominant for near objects.
With tgt focus, my right eye is in control at all times. The extra images of the FS and RS, also caused by parallax, are readily ignored by my brain because they're seen better by my left eye. It's more natural to me because of the unique nature of my eyesight.
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