Opth- anatomy

Question 1

what layer is the uvea of the eye

Answer 1

the middle layer of the eye

Question 2

what does the uvea of the eye contain

Answer 2

iris
ciliary body
choroid

Question 3

where is the uvea of the eye located

Answer 3

between the sclera and retina

Question 4

what is the sclera

Answer 4

the white outer coating of the eye

Question 5

what is the retina

Answer 5

the light sensitive tissue at the back of the eye that receives images and converts them into electrical signals

Question 6

what produces aqueous humour and where does the aqueous humour flow through and leave via

Answer 6

produced by ciliary body
flows through pupil
leaves via the trabecular meshwork

Question 7

how many bones make up the orbit

Answer 7

7- 4 facial, 3 cranial

Question 8

name all 7 orbital bones

Answer 8

frontal
sphenoid
zygomatic
maxillary
palatine
ethmoid
lacrimal

Question 9

what is the lateral rectus muscle responsible for

Answer 9

moving the eye outwards (abduction)

Question 10

what is the medial rectus muscle responsible for

Answer 10

moving the eye inward (adduction)

Question 11

what is the superior oblique muscle responsible for

Answer 11

depressing the eye and rotating it inwards

Question 12

what is the superior rectus muscle responsible for

Answer 12

elevating the eye

Question 13

what is the inferior oblique muscle responsible for

Answer 13

elevating the eye and rotating it outwards

Question 14

what is the inferior rectus muscle responsible for

Answer 14

depressing the eye

Question 15

what is the vitreous cavity

Answer 15

the largest space inside the eyeball filled with a clear, gel-like substance called the vitreous humor

Question 16

what are the weakest parts of the orbit

Answer 16

medial and inferior walls (ethmoidal and palatine bones)- most likely regions for blowout to occur

Question 17

the orbit of the eye is aka

Answer 17

the eye socket

Question 18

what artery and nerve makes up the optic canal

Answer 18

optic nerve (CN II)
opthalmic artery

Question 19

what nerves and veins make up the superior orbital fissure

Answer 19

CN 3,4,5 (1), 6
ophthalmic veins

Question 20

what is the function of the lacrimal apparatus

Answer 20

produces tears

Question 21

which nerve innervates the lacrimal apparatus

Answer 21

CN VII (facial nerve)

Question 22

where does the eye receive its blood supply from primarily

Answer 22

opthalmic artery

Question 23

the opthalmic artery is a brach of what

Answer 23

internal carotid artery

Question 24

what light do cones of the retina detect

Answer 24

coloured vision

Question 25

what light do rods of the retina detect

Answer 25

dim vision and black/white

Question 26

what is the macula

Answer 26

small, oval-shaped, darker area in centre of retina associated with high number of neurones and high visual acuity

Question 27

what is the fovea

Answer 27

central point of macula where visual acuity is at its highest

Question 28

remember: LR6, SO4, AO3

Answer 28

lateral rectus muscle- CN VI superior oblique muscle- CN IV all others- CN III

Question 29

most likely extra-ocular muscle to be damaged in a blow out

Answer 29

inferior rectus muscle

Question 30

what is the levator palpebral superioris responsible for

Answer 30

elevation of the eyelid

Question 31

where does CN V1 supply sensory innervation to

Answer 31

upper eyelid cornea

Question 32

where does CN V2 supply sensory innervation to

Answer 32

lower eyelids nostrils upper lip

Question 33

where does CN V3 supply sensory innervation to

Answer 33

lower lip mandible

Question 34

which two cranial nerves does the blink reflex involve

Answer 34

CN V1 CN VII

Question 35

parasympathetic cell bodies associated with the eye

Answer 35

edinger-westphal nucleus

Question 36

the edinger-westphal nucleus is responsible for pupil constriction/dilation?

Answer 36

pupil constriction