Objective: How to easily capture the shape of a human eye on a drawing?

Which of the following solutions is more sound in terms of naive physics reasoning?

Pick from: [I] Draw two overlapping circles big and distant enough so that the overlapping region makes the shape of the eye as per desired size of the drawing. [II] Take a wooden carving of an eye, color the edges of it and press it against the drawing paper to imprint the outline on to the paper.
[I]