Asaro explains the structure of the eye in his book "Planes of the head":
My analysis on real faces with 3 types of lids (not slanting, slanting up, slanting down):
Sunday, October 24, 2010
Monday, October 18, 2010
P.S. in the lower drawing the chin is off the center. Did not see it until now :-)
I saw similar approach in Nathan Fowkes drawings, take a look here.
Sunday, October 17, 2010
"..The planes of the head should be memorized, for through them we have a foundation for rendering the head in light and shadow..." (A.Loomis)
Working on these magazine photos I was surprised to see how smooth were faces. Almost no visible planes. Loomis actually writes about it:
"...If you have softened the edge so much as to have lost the plane, the drawing is bound to take a smooth, photographic look. For this reason, planes have to be established when you are drawing from a photograph, since they are not apparent..."