Eye

Question 1

What is cranial nerve 3? WHat function does it have?

Answer 1

oculomotor nerve

• innervates most of the extaocular muscles such as:
• medial rectus
• superior rectus
• inferior rectus
• inferior oblique

Question 2

What nerve innervates the lateral rectus muscle? What is this nerve’s name?

Answer 2

cranial nerve 6

- abducens nerve

Question 3

In terms of eye anatomy, what does extortion mean?

Answer 3

• rotate the top of the eye away from the nose

Question 4

In terms of eye anatomy, what does intortion mean?

Answer 4

• rotate top of the eye towards nose

Question 5

In terms of eye anatomy, what does adduction mean?

Answer 5

• move the eye inwards, towards the nose

Question 6

In terms of eye anatomy, what does abduction mean?

Answer 6

• move the eye outwards, away from the nose

Question 7

In terms of eye anatomy, what does elevation mean?

Answer 7

move the eye upwards

Question 8

In terms of eye anatomy, what does depression mean?

Answer 8

• move the eye downwards

Question 9

What nerve innervates the superior oblique muscle?

Answer 9

cranial nerve 4 - trochlear nerve

Question 10

How many layers of the eye are there?

Answer 10

• 3 layers
  1. fibrous coat
  2. uvea
  3. neural/retina

Question 11

What is the uvea layer comprised of?

Answer 11

• iris
• ciliary body
• choroid

Question 12

What is the retina/neural layer made of?

Answer 12

retina

Question 13

What is the fibrous coat made of?

Answer 13

• cornea

- sclera

Question 14

How many layers does the retina have? What are they? (inner to outer)

Answer 14

• inner limiting membrane
• nervefibre layer
• ganglion cell layer
• inner plexiform layer
• inner nuclear layer
• outer plexiform layer
• outer nuclear layer
• external limiting membrane
• photoreceptor layer
• pigmented layer
• choroid
• sclera

Question 15

What are rod photoreceptors responsible for?

Answer 15

• night vision