Bigkahuna said:and her dominant eye is over the stick.
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This isn't necessarily the best head position. Obviously, if she thinks she is aiming at one thing, but not hitting it, her perception of where her cue is pointed is different from reality. Forget D-eye and just focus on getting her head positioned over the cue so that her perception of straight matches reality. If the cue is under her eye, under her chin, or under her ear...if that is how she sees the straight line, that's the right position for her.
Steve