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Flashcards in Orbit Deck (39)
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1

What are the orbital contents?

Eyeball, fat, connective tissues, extraocular muscles, nerves and blood vessels

2

What is within the tarsal plates?

Dense connective tissue, support eyelid and glands

3

What are the two ligaments in the eye?

Suspensory ligaments and check ligaments

4

What does the suspensory ligament do?

Support eyeball

5

What does the check ligaments do?

Restrict medial and lateral recti

6

What is within the vascular layer of the eye?

Ciliary body and choroid

7

What is the middle coat called?

Vascular layer

8

What are the fibrous layer called?

Cornea and Sclera

9

What is the inner layer called?

The Retina

10

What is the Macula Lutea of the retina?

Fovea

11

What does the retina contain?

Rods and cones

12

What controls the blind spot in the retina?

Optic disc

13

What is the function of the Aqueous humor?

Helps maintain intra-ocular pressure

14

What is the Aqueous humor made of?

Ciliary body

15

Where does the Aqueous humor drain into?

Corneo-scleral junction (Canal of Schlemm)

16

Describe the Vitreous humor (body)

Embryological, Transparent jelly, posterior to lens and supports retina

17

What are the Intraocular (intrinsic) muscles?

Dilator pupillae and Sphincter pupillae

18

What does the Dilator papillae do?

Increases the diameter of the pupil

19

What does the Sphincter pupillae do?

Decrease the diameter of the pupil

20

What is the ciliary muscle?

Intrinsic eye muscle that changes the shape of the lens for accommodation

21

What nerve passes through the ciliary muscle?

Oculomotor nerve

22

How many extraocular muscles are there?

7

23

What are the 7 extraocular muscles?

Levator Palpebrae,
Superior Rectus,
Inferior Rectus,
Medial Rectus,
Lateral Rectus,
Superior Oblique and Inferior Oblique

24

What is the action of the Levator Palpebrae?

Raise upper eyelid

25

What is the action of the Superior Rectus?

Elevation, Adduction and intorsion

26

What is the action of the Inferior Rectus?

Depression, Adduction and extorsion

27

What is the action of the Medial Rectus?

Adduction

28

What is the action of the Lateral Rectus?

Abduction

29

What is the action of the Superior Oblique?

Intorsion, depression an abduction

30

What is the action of the Inferior Oblique?

Extorsion, Elevation and abduction