When you adjust all the parallax out, it doesn't matter where your eye is. If you knew what an AO was for, and how it was used, you wouldn't have to ask such a dumazz question. You were an idiot 6 years ago when I put you on ignore, and you're still an idiot. Come back when you're 12..........
Except for the little fact that poor cheek weld results in difficulty returning one's head to the same position every time.
