Proportions of the head Part 1

When I need to design a character's head, I pay special attention to the proportions. I first divide my head in half and place my eye line, which follows the lower eye lid either above, below or right on the mid line of the head. This gives me a variety of heads to choose from! What happens to every thing else when I change the eye line level? Join me next week when I go into proportions of the head in further detail!