Eyeball: organ of sight comprised principally of the iris, the lens, the pupil and the cornea.
Tendon: tissue connecting the orbicular muscle of the eyelids to the bony part of the orbit.
Orbit: one of two skull cavities containing the eyeballs.
Infraorbital fatly tissue: fatty tissue on the inside of the orbit.
Extrinsic skeletal muscle of the eye: eye muscles attached to the outer wall of the eyeball.
Optic nerve: conductor of nerve impulses in the eye.
Episcleral space: interstice between the eyeball and the capsule of Tenon.
Crystalline lens: part of the eye behind the pupil that focuses light rays onto the retina.
Cornea: front part of the eye, an extension of the sclera.
Inferior tarsus: muscles that draw the lower eyelids inward.
Eyelashes: hairs along the edge of the eyelids.
Eyeball: sphere forming the eye.
Limbus: peripheral structure of an organ.
Tarsal glands: glands related to the muscles that draw the eyelids inward.
Conjunctiva: thin, translucent membrane covering the eyeball.
Superior tarsus: muscles that draw the upper eyelids inward.
Conjunctival corners (fornix): upper limit of the conjunctiva.
Orbital septum: division between the two skull cavities containing the eyes.
Orbicularis oris: muscle that closes the eyelids.
Conjunctiva: part of the conjunctiva that covers an unexposed part of the eyeball.