11 Eye

Question 1

what is the function of the pupil

Answer 1

opening and how light gets into the eye

Question 2

what is the function of the iris

Answer 2

a diaphragm which regulates the size of the pupil to control the amount of light that enters the eye

Question 3

what lies over the pupil and iris

Answer 3

transparent cornea

Question 4

what is the fleshy papilla on the medial side of the eye

Answer 4

lacrimal caruncle

Question 5

what is the conjunctiva

Answer 5

mucous membrane which covers the sclera

Question 6

how is conjunctivitis treated

Answer 6

• antibiotic drops

- fairly infectious

Question 7

on what parts of the eye are there eyelashes

Answer 7

• the more square parts of the eyelids

Question 8

where should the upper eyelid be in relation to the iris

Answer 8

slightly covering it

Question 9

what might you suspect if you could see the whole of a paitents iris

Answer 9

that they have/have had thyroid problems

Question 10

why is the eye often pushed forwards in hyperthyroidism

Answer 10

the fat in the orbit pushes the eye forwards

Question 11

what is it called if someone has infected eyelash follicles

Answer 11

stye

Question 12

what glands produce an oily secretion in the eyelids

Answer 12

meibomian glands

Question 13

what is it called when the meibomian glands get blocked

Answer 13

meibomian cyst (little round tubercle in the eyelid)

Question 14

what is the function of tears

Answer 14

to keep the eye moist

Question 15

what is the function of the oily secretion

Answer 15

to keep tears between the front of the eye and eyelid

Question 16

where is the lacrimal gland

Answer 16

front part of the upper orbit on the lateral side and extending onto the eyelid

Question 17

what is important to do with a patient who has facial palsy

Answer 17

give them an eyepatch to protect cornea as can’t close eyelid

Question 18

what is the little hole where the square part meets the smoother part on both eyelids

Answer 18

lacrimal punctum

Question 19

where do the tears go after being over the eye

Answer 19

• through the lacrimal punctum
• then into lacrimal canaliculi via capillary action
• into the lacrimal sac and then come out into the nasolacrimal duct into the inferior meatus of the nasal cavity

Question 20

where does the frontal air sinus often extend to

Answer 20

the roof of the orbit

Question 21

what is the frontal nerve a branch of

Answer 21

the opthalmic nerve

Question 22

what does the frontal nerve spit into

Answer 22

• supraorbital nerve

- supratrochlear nerve

Question 23

what does the supraorbital nerve supply

Answer 23

sensation to the forehead and scalp

Question 24

what does the supratrochlear nerve supply

Answer 24

skin at medial end of eyelid and a bit of forehead

Question 25

what muscles helps to keep the upper eyelid open

Answer 25

levator palpebrae superioris muscle

Question 26

what supplies the levator palpebrae superioris muscle

Answer 26

• CNIII (skeletal muscle part)

- sympathetic supply (smooth muscle part)

Question 27

why might you get a drooping eyelid

Answer 27

if either CNIII or sympathetic supply isn’t working

Question 28

what does the superior rectus muscle do

Answer 28

moves the pupil up when eyeball is swivelling

Question 29

what supplies the superior rectus muscle

Answer 29

CNIII

Question 30

which muscle turns the eye out the way (abducts the eye)

Answer 30

lateral rectus muscle

Question 31

what supplies the lateral rectus muscle

Answer 31

abducens nerve

Question 32

what does the superior oblique muscle do

Answer 32

makes the pupil go down

Question 33

what does the superior oblique muscle look like

Answer 33

has a tendon on a pully which it changes direction on and spreads out to attach to the eyeball

Question 34

what supplies the superior oblique muscle

Answer 34

CNIV