I mean are you Right eye dominant or Left eye dominant , for me its Left eye.
Here is the test
Extend both hands forward of your body and place the hands together making a small triangle between your thumbs and the first knuckle.
With both eyes open, look through the triangle and center something such as a doorknob or the bullseye of a target in the triangle.
Close your left eye. If the object remains in view, you are right eye dominant. If your hands appear to move off the object and move to the left, then you are left eye dominant.
To validate the first test, look through the triangle and center the object again with both eyes open.
Close your right eye. If the object remains in view, you are left eye dominant. If your hands appear to move off the object and move to the right, then you are right eye dominant.
so for me I use my left eye to focus in the view finder with my right eye open , will this make a difference to our shots if we are not using the dominant eye