Who this may relevant for: I think some of the minute <.25 diopter differences between eyes and tiny astigmatism can easily addressed by this neat posture trick using your ability to detect Ocular Dominance
And is an especially neat trick especially for those of you that are in front of screens all day.
Testing your ocular dominance: So you look at the screen, or your object of interest. If you pay attention to your periphery while concentrating on your object of interest. Then, if you are exposing your right’s sides face more then you will see the right side of your nose (you will see the right side of your nose in the left area of your field of vision). likewise, if you are exposing your face’s left side more then you will see the left side of your nose (in the right of your field of view)
The trick to Adjusting your ocular dominance: try to get in the middle so that you are seeing both sides of your nose in the periphery roughly the same while your eyes are concentrating ahead in the direction of your object of visual interest.