Step 10: Inside the head, lightly sketch two small circles for the eyes. Use the initial lines as guides for the size and placement of the cat's eyes. When you get the size and position right, darken the lines but make the sides pointier for the corners of the eyes. The inner corners of the sphynx's eyes should point down toward the muzzle, and the outer corners should point up.
Step 11: Inside each eye, near the middle, draw a thin, slit-like shape for the sphynx's pupils. On the side of each pupil, draw a tiny circle for highlights. Inside each eye, on the sides, draw a couple of lines for the cat's actual eyeball. Draw a series of short lines around the eyes for the wrinkly skin. Lightly shade the tops of the eyeballs to make the shapes rounder. Use a value that's lighter than the pupils and don't overlap the tiny highlight circles as you shade.
Step 12: Inside the muzzle, near the top left, lightly sketch a small triangle for the cat's nose. When you get the size and position right, darken the lines. Make the lines on the sides wavier for the nostrils. Add a small line inside the sphynx's nose, at the bottom. Make the top edge wavy and the top corners pointy.
Step 13: Under the nose, draw a line that curves to the right for the first part of the sphynx's mouth. To the left, draw a line that curves up along the edge of the initial circle for the other side of the mouth and muzzle. Curve the line on the right along the initial circle for the other side of the muzzle. Add a line under the cat's mouth for the chin. The line for the chin should be wavy for the loose skin. Add some lines above the nose for structure.
Step 14: Use the arc on the top, right side of the head as a guide to draw the first ear. Darken the arc to create the shape of the sphynx cat's ear. Add some lines at the bottom for the wrinkly base. Add a few lines along the edges of the ear for inner ear opening. Add more short, curved lines along the bottom of the ear for the inner ear structure.