This might be a silly question, but I'm still getting used to shooting with a scope.

Is there an accepted 'normal' distance for your eye to be from the scope? I ask because I find quite a difference when I'm say kneeling and aiming to when I'm prone on the ground.

I move my eye around until I have the clearest full view through, but find moving left/right/up/down even a small amount will blur out that side of the scope. I found that moving back a bit gives a clearer view but with a bit less tolerance of lateral movement.

Be grateful for any advice.

J.