Eye and Orbit (week 3) Flashcards Preview

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Flashcards in Eye and Orbit (week 3) Deck (55):
0

Function of Orbicularis Oculi

Closes eyelids

1

What muscle opens the upper eyelid

Levator Palpebrae Superioris

2

What CN innervates muscle to open eye

CN III

3

What CN innervates muscle to close eye

CN VII

4

What is the Tarsal Plate

Connective tissue "skeleton" of eyelid

5

Two glands that make up Tarsal Plate

Tarsal glands and Ciliary glands

6

What do the Tarsal glands do

secrete a fatty secretion and keeps eyelids from sticking together

7

Function of Ciliary glands

Sebaceous glands

8

What is the Conjunctiva

Mucous membrane of eyelid and eyeball

9

Conjunctiva consists of what two parts

Palpebral conjunctiva and Bulbar conjunctiva

10

Characteristic of Palpebral conjunctiva

Continuous with skin, very vascular

11

Continuous of Bulbar conjunctiva

Continuous with cornea and transparent

12

What cranial nerve and fibers innervate Lacrimal gland

CN VII, Parasympathetic fibers

13

Pathway for Lacrimal Gland

Tears from LG --> Superior and Inferior puncta --> Lacrimal Canal --> Lacrimal sac --> Nasolacrimal duct --> Nasal cavity

14

The Cornea is continuous with what?

Sclera

15

Sclera is continuous with what?

Dural sheath of optic nerve and Cornea

16

Eyeball is made up of what three layers

Outer Fibrous Coat, Middle Vascular Coat and Inner Retinal layer

17

What makes up the Outer Fibrous coat

The continuous layer of the dural sheath of optic fiber, Sclera and Cornea

18

What makes up the Middle Vascular coat

The Choroid

19

Choroid is fixed between what two structures?

Sclera and Retina

20

What makes up the Inner Retinal layer

Retina

21

What is the Ciliary body?

The end of the Choroid

22

Ciliary process

Folds in Ciliary body

23

What produces aqueous humor

Ciliary folds, flows from posterior to anterior chamber

24

Ciliary muscles are controlled by what CN and what fibers

CN III, parasympathetic fibers

25

What do the suspensory ligaments do to the lens

move lens to focus

26

Contraction of the ciliary muscles does what to the lens

Makes it rounder

27

Flattening of the lens is caused by what?

Relaxation

28

Lens is Avascular? T or F

True

29

What is the optic disk

Where the optic nerve enters; Insensitive to light

30

What is the Macula Lutea

A disc with the fovea centralis; most acute vision

31

Superior Rectus action

Elevate, Adduct

32

Middle Rectus action

Adduct

33

Lateral Rectus action

Abduct

34

Superior Oblique action

Down and out (Abduct and lowers)

35

Action of Inferior Rectus

Lowers and Adducts

36

Attachment of Inferior Oblique

Maxillary bone

37

Attachment of most eye muscles

Common Tendinous Ring

38

What Major artery supplies blood to eye

Internal Carotid

39

What arterial branches supplies blood to Ciliary Body and Iris

Ciliary Arteries-->Long Ciliary arteries
Lacrimal Artery --> anterior ciliary arteries

40

Short Posterior Ciliary arteries supply blood to what?

Choroid Layer

41

Two veins associated with eye?

Superior Opthalmic vein and Inferior Opthalmic vein

42

Where does the Superior opthalmic vein drain?

Cavernous sinus

43

Where does Inferior Opthalmic vein drain?

Pterygoid plexus and cavernous sinus

44

Both veins of eye anastomose with what other vein?

Facial vein

45

What nerve supplies special sensory to the eye?

Optic nerve (CN II)

46

What nerve branch provides general sensory to the eyeball?

Long Ciliary nerve, a branch of the Nasociliary nerve of V1

47

What nerve supplies general sensory to the eyeball and lower eyelid

Inferior Palpebral nerve, a branch of Infraorbital nerve of V2

48

What are the post parasympathetic nerves to the ciliary muscle and Sphinctor puillae called after they leave the ciliary ganglion?

Short Ciliary nerves

49

What structures do oculomotor parasympathetic fibers innervate?

Ciliary muscles and sphinctor pupillae

50

What structures of the eye need sympathetic innervation?

Dilator Pupillae and Superior Tarsal muscle

51

Corneal Reflex normal should do what?

Cause both eyelids to close

52

Absent ipsilateral with normal contralateral response?

Normal V with abnormal ipsilateral VII

53

Absent contralateral response

Abnormal contralateral VII

54

Absent bilateral response

V abnormality OR bilateral VII abnormality