Above the eye socket, or orbit, the frontal bone is buttressed and of double
thickness. The cheek bones beneath are reinforced and the entire bony struc-
ture surrounding the eye is designed to protect this vulnerable and expressive
feature of the face.
The eye, cushioned in fat, rests in this socket. In shape, the eyeball is
somewhat round. Its exposed portion consists of pupil, iris, cornea and the
"white of the eye." Due to the transparent covering, or cornea, which fits
over the iris, much as a watch crystal fits over a watch, making a part of a
smaller sphere laid over a larger one, the eye is slightly projected in front.
It is the upper lid which moves. Its curtain, when closed, is drawn smooth-
ly over the eye; when open, its lower part follows the curve of the eyeball,
like the roll top of a desk, folding in beneath the upper part and leaving a
wrinkle to mark the fold. The transparent cornea of the eye, raised percepti-
bly and always partly covered by the upper lid, makes this lid bulge. This
bulge on the lid travels with the eyeball as it moves, whether opened or closed.
The lower lid is quite stable. It may be wrinkled and slightly lifted inward,
bulging below the inner end of the lid. The lashes which fringe the upper and
lower lids from their outer margin, shade the eye and serve as delicate feelers
to protect it, the upper lid instinctively closing when they are touched.
THE EAR
1 he ear, irregular in form, is placed on the side of
the head. The line of the ear toward the face is on a
line with the upper angle of the lower jaw. The ear,
in man, has lost practically all movement. It is shaped
like half of a bowl with a rim turned out, and below
is appended a piece of fatty tissue called a lobe. Its
muscles which in primitive times, no doubt, could
move it to catch faint sounds, now serve only to draw
it into wrinkles, which, though varying widely, have
certain definite forms. There is an outer rim often
bearing the remains of a tip, an inner elevation in
front of which is the hollow of the ear with the canal's
opening protected in front by a flap and behind and
below by smaller flaps.
The ear has three planes divided by lines radiating from the canal, up and
back and down and back. The first line marks a depressed angle between its
planes. The second marks a raised angle.
PLANES OF
THE EAR