Quote:
Sport45 : Your focus is on the pencil rather than the doorknob. Try playing with your focus until you see 2 pencils and one doorknob. One pencil will be more distinct than the other.
Right eye dominant: the left pencil will be most distinct, and aimed at the dorknob.
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The eraser being under the right doorknob tells me the same thing. Focusing on the doorknob both pencils look pretty much the same. If I stare at the doorknob long enough one pencil image or the other (seems random) will go away entirely.
For target shooting (round black bulls on paper) I close my left eye or wind up with a headache along with a bad score.
The last time I qualified for my carry permit I used both eyes and point shot well enough to pass.
If I have time to aim I'm closing my left eye. If I don't have time to aim I won't. YMMV