Eye&Orbit--Exam III

Question 1

What is the muscle that closes the eye? What is it innervated by?

Answer 1

Orbicularis Oculi-VII.. Remember the “hook” thing?!

Question 2

What is the muscle that opens the eye? What is it innervated by? What is the small muscle inside this muscle that is sympathetically innervated?

Answer 2

Levator Palpebrae Superioris-III. Remember III keeps the eye open?! The SUPERIOR TARSAL muscle is smooth muscle with in the LevPalpebrae that sympathetically keeps the eyes open

Question 3

What are the function of the Tarsal Glands?

Answer 3

To produce a fatty secretion that will keep the eyelids from sticking together

Question 4

What is the mucous membrane of the eyelid and eyeball?

Answer 4

The conjunctiva

Question 5

What type of conjunctiva is continuous with the skin and is very vascular?

Answer 5

Palpebal Conjunctiva

Question 6

What type of conjunctiva is transparent and is continuous with the cornea?

Answer 6

Bulbar Conjunctiva

Question 7

Describe the sensory innervation to the upper eyelid

Answer 7

V1–>Lacrimal, Frontal–>SupraOrbital, SupraTrochlear

Question 8

Describe the sensory innervation to the lower eyelid

Answer 8

V2–>Inferior Palpebral

Question 9

Describe the blood supply to the upper eyelid

Answer 9

Internal Carotid–>Opthalmic–>SupraOrbital, SupraTrochlear

Question 10

Describe the blood supply to the lower eyelid

Answer 10

Maxillary–>InfraOrbital–>Inferior Palpebral

Question 11

Describe the Lacrimal Drainage System…

Answer 11

Tears from Lacrimal Gland–>Superior and Inferior Puncta–>Lacrimal Canal–>Lacrimal Sac–>NasoLacrimal Duct–>Nasal Cavity (Inferior Meatus)

Question 12

Where does the lacrimal secretion drain into the nasal cavity?

Answer 12

Inferior Meatus

Question 13

What are the three continuous outer layers of the eyeball?

Answer 13

The Dural Sheeth, Sclera, & Cornea

Question 14

What is the layer in between the sclera and retina?

Answer 14

Choroid

Question 15

What is the internal layer of the eyeball that contains the special receptors?

Answer 15

The Retina

Question 16

What is the body where the termination of the choroid and the beginning of the iris takes place?

Answer 16

Ciliary Body

Question 17

What produces Aqueous Humor (flows from anterior chamber to posterior chamber) of the eye?

Answer 17

The Ciliary Process

Question 18

What muscles are in control of the lens? What are they innervated by?

Answer 18

The Cilliary muscles. They are Parasympathetically controlled by III

Question 19

What are the two muscles of the Iris? What type of control for each?

Answer 19

Sphincter Pupillae–Parasympatheic (Poop/Sphincter…Get It?!) & Dilator Pupillae-Sympathetic(wide eyed and running from saber tooth tiger)

Question 20

What are the “ligaments” that attach the lens to the ciliary muscles?

Answer 20

Suspensory Ligaments

Question 21

What happens to the lens on CONTRACTION of the ciliary muscles?

Answer 21

ROUND lens

Question 22

What happens to the lens on RELAXATION of the ciliary muscles?

Answer 22

FLAT lens (YOU LIE FLAT ON THE GOUND WHEN RELAXED)

Question 23

Where is the most acute vision in the retna? What is the portion that makes the acute vision possible?

Answer 23

The macula lutea and the fovea centralis

Question 24

What is the only eye muscle NOT apart of the CTR?

Answer 24

The inferior oblique

Question 25

What direction does the Superior Oblique Pull? What region of the eyeball is the SO attached?

Answer 25

Down and Out. Attached to the Superior Lateral Posterior aspect of the eyeball

Question 26

What direction does the Inferior Oblique pull?

Answer 26

Up and Out

Question 27

What are the eye ball Adductors?

Answer 27

Medial Rectus (& Inferior/Superior Rectus to an extent)

Question 28

What are the eyeball ABductors?

Answer 28

Superior & Inferior Obliques; Lateral Rectus

Question 29

What are the eyeball elevators?

Answer 29

Superior Rectus and Inferior Oblique

Question 30

What are the eyeball depressors?

Answer 30

Inferior Rectus and Superior Oblique

Question 31

What are the 4 eyeball rotators?

Answer 31

S.O., I.O., I.R. S.R.

Question 32

What are the two divisions of C.N. III when it enters the orbit? What does it innervate?

Answer 32

Superior: Superior Rectus, Levator Palpebrae Superioris Inferior: Medial Rectus, Inferior Rectus, Inferior Oblique

Question 33

What are the only NAMED post ganglionic nerves you will see? What CN are they involved with?

Answer 33

Short Ciliary Nerves...CN III

Question 34

What is the test for the interaction between CN VII and CN V? What happens?

Answer 34

Coronal Reflex...Touching the cornea with cotton should make BOTH eyes blink..