Orbit

Question 1

All recti muscles originate______.

Answer 1

medially (from anulus tendineus)

Question 2

What are the extraocular muscles that do not originate from the anulus tendineus?

Answer 2

• Superior oblique
• Inferior oblique
• Levator palpebrae superioris

Question 3

Explain IO UO SO DO.

Answer 3

• Inferior oblique: moves eye up and out

- Superior oblique: moves eye down and out

Question 4

The superior and inferior ophthalmic veins pass through which foramen and into which sinus?

Answer 4

superior orbital fissure; cavernous sinus

Question 5

What are the 3 layers of the eye?

Answer 5

• Sclera
• Choroid
• Retina

Question 6

Afferent fibers of the retina converge to form the_______.

Answer 6

optic nerve

Question 7

What forms the blood:retina barrier?

Answer 7

tight junctions b/t Mueller cells

Question 8

Which way are the constrictor pupillae vs. dilator pupillae oriented?

Answer 8

• Constrictor: circumferentially

- Dilator: radially

Question 9

Which arteries supply the uvea?

Answer 9

ciliary arteries (branch of ophthalmic artery)

Question 10

Where does the central retinal vein drain the retina into?

Answer 10

the cavernous sinus