A simple sketch to indicate eyes.
The sketch is more evolved. Practice the last 3 drawings.
Two eyes, one is the mirror image of the other.
Eyebrows are neither a a straight line nor an arc. Instead draw the eyebrow as
a downturn toward the outside of the eye socket.
Eyebrows show expression.
Use the eyes to indicate expression, or to draw the eye of the viewer into
the picture to show what you want to show.
Simple Sketching, by L. A. Doust
Simple sketching: How to turn your ideas and impressions into pictures Buy a copy at Amazon.com
Simple Sketching The 1957 Edition at Amazon.com