Shawn Kelly:

Leading with the eyes of head (
Reference: CGChar)
"As a general rule of thumb, leading with the eyes first is what humans do 90% of the time, so it's usually a safe bet.

If you want to lead with the head first, make sure it's for a reason. Leading with the head first has a very dramatic feeling associated with it. Film yourself looking around normally, or turning towards a sound you hear - you will lead with your eyes every time. If you try leading with the head first, you will have a whole different feeling associated with the performance - especially if the head turn is fairly slow. It will feel very scary or dramatic.

So, if we're talking about rules or "formulas", lead with the eyes. But remember rules are made to be broken, but make sure you are breaking the rules for a *reason.*

And as a side-note, rules and formulas exist for a reason. People have been using them successfully for decades and they will serve you well. It's a great idea to learn the "rules" first and *then* learn where/when to break them, what that means to your scene, and most importantly, WHY you want to break that rule. In this case, it could be to add some dramatic tension - say your character just heard that the woman to his left is his long-lost mother that he has been searching for - maybe the person telling him that she is his mom is standing in front of him, and you'd like to lead with the head slowly towards Mom while the eyes stay locked and wide on the person in front of the character before darting over to Mom.

Does that make sense? Like always, the best way to experiment with this stuff is to observe those around you and/or film yourself and see how it feels and why you move your eyes in certain ways. For obvious reasons, your eyes are one of the few things that you can't study in a mirror, so bust out that video camera and look around until you aren't thinking about what you're doing anymore, and see how your eyes naturally move and how they relate to your head/torso/shoulder movements..."