Accessory Structures of the Eye

What are the accessory structures of the eye

Eyebrows, eyelids, conjunctive, lacrimal apparatus, extrinsic eye muscles

What is the function of the eyebrows

shade eye from sunlight, prevent perspiration from reaching eye; protection

What is the function of the eyelids (palpebrae)

protect the eye anteriorly; we blink every 3-7 seconds

What does blinking do

spreads tears and washes surface of the eye

What is the conjunctiva

transparent mucous membrane that produces a lubricating mucous secretion

The palpebrae conjunctiva covers the

Eyelids

The bulbar conjuctiva is associated with

The anterior eye (only the whites of the eye)

What accessory structure of the eye releases lacrimal secretion (tears)

The lacrimal apparatus

What is the flow of tears in the eye

Tears flow from the superior lateral portion of the eye, down across the eye, to the lacrimal conaliculi at openings called the lacrimal puncta. Tears then drain tot he lacrimal sac

What do tears contain

Mucus, antibodies, lysosomes

How many extrinsic muscles of the eye are there

6

What are the extrinsic muscles of the eye

Lateral rectus, medial rectus, superior rectus, inferior rectus, inferior oblique, superior oblique

Which eye muscles moves the eye laterally

Lateral rectus

The ____ ____ moves the eye medally

Medial rectus

Which muscle elevates the eye and turns it medially

Superior rectus

Which eye muscle depresses and turns the eye medially

Inferior rectus

Which eye muscle elevates the eye and turns it laterally

Inferior oblique

What eye muscle depresses the eye and turns it laterally

superior oblique

Double vision occurs when muscles of the eye are not coordinated. What is this known as

Diplopia