A. Front View of the Eye

I. Eye Brow

• Acts as a barrier to prevent sweat from getting into the eye.

II. Eye Lashes

• Filter and prevent dust from reaching the eye.

III. Tear Gland

• Produces tears that lubricate the eye.

• Tears contain enzyme that digests bacteria that enters the eye.

IV. Tear duct

• Drains tears.

V. Sclera

· Tough, white outer covering that protects the eyeball.

VI. Iris

· Consists of two sets of antagonistic muscles – (i) circular muscles of the iris and (ii) radial muscles of the iris that control the size of the pupil.

VII. Pupil

· Opening through which light enters.

· Usually appears as black.