Eye, Ear, and Nose Injuries
Lesson 1: Irrigate, Instill Eye Drops, and Apply Ointments to the Eye
1-3
1-3. PARTS OF THE EYE
It will be to your advantage to become familiar with the following terms and definitions. You should also know their location. (See figure 1-1.)
a. Iris--the colored portion of the eye.
b. Pupil--the opening in the center of the iris where light is permitted to enter.
c. Cornea--he normally transparent anterior surface of the eye.
d. Sclera-- the "white coat" of the eye.
e. Limbus-- the edge of the cornea where the cornea joins the sclera.
f. Inner/outer canthus--the angle formed by lids at either end of the eyelids.
g. Nasolacrimal duct--the channel where tears flow from the eye (lacrimal punctum) through the nose.
h. Conjunctiva--the thin, mucous, transparent membrane covering the front surface of the eye.
i. Conjunctival sac--the "bag" under the eye, beneath the eyelid.
j. Top/bottom eyelid--the movable fold of the skin forming the protective curtain over the eyeball.
k. Orbit--the bony cavity containing the eyeball.
Figure 1-1. Parts of the eye.
