orbit

Question 1

what is the function of the conjunctiva

Answer 1

Protects the eye.
Covers inside of eyelid and sclera
Creates the mucous that forms part of tears

Question 2

what are the three layers of the eye

Answer 2

1. fibrous
2. vascular
3. neural

Question 3

what is in the fibrous layer of the eye

Answer 3

cornea and sclera

Question 4

what is in the vascular layer of the eye

Answer 4

choroid
ciliary body
iris

Question 5

what is the function of the ciliary body

Answer 5

accommodation - ciliary muscles

Question 6

what is the function of the sclera

Answer 6

recieves extra-ocular muscles
has optic nerve

Question 7

what is the function of the iris

Answer 7

constricts and dilates the muscle of the pupil

Question 8

what happens to pupil in bright light

Answer 8

pupil contricts as circular muscles of iris contract

Question 9

what happens to the pupil in dim light

Answer 9

pupil dilates as radial muscles of iris contract

Question 10

what is in the neural layer of the eye

Answer 10

retina

Question 11

what is the macula lutea/fovea

Answer 11

part of retina responsible for visual acuity
which contains very high concentration of cones. These are the light-sensitive cells in the retina that give detailed central vision

Question 12

what bones are in the orbit

Answer 12

frontal, zygomatic, maxillary, ethmoid, sphenoid, lacrimal

Question 13

what is the function of the aqueous humor

Answer 13

keeps eye inflated and provides nourishment

Question 14

what is the lateral wall of the orbit

Answer 14

infratemporal fossa

Question 15

what is the floor of the orbit

Answer 15

maxillary sinus

Question 16

what is the function of the orbital rim

Answer 16

to protect the contents of the orbit and provide attachment site for orbital septum

Question 17

what are the extra-ocular muscles to the fibrous ring at back of orbit

Answer 17

superior rectus
medial rectus
lateral rectus
inferior rectus

Question 18

what is the function of the superior rectus

Answer 18

rotate eye superiorly

Question 19

what is the function of the medial rectus

Answer 19

adducts eye

Question 20

what muscle abducts the eye

Answer 20

lateral rectus

Question 21

what is the function of the inferior rectus

Answer 21

rotate eye inferiorly

Question 22

what are the extra-ocular muscles that ar not attached to the ring

Answer 22

supeior and inferior obliques

Question 23

what is the function of the superior oblique

Answer 23

causes eye to torque inward and inferiorly

Question 24

what is the function of the inferior oblique of eye

Answer 24

torques the eye downward and laterally

Question 25

what is the function of the levator palpebrae superioris muscle

Answer 25

elevates eyelid during eye opening

Question 26

what is the suspensory ligament of lockwood

Answer 26

The suspensory ligament is slung like a hammock below the eye-ball. It is formed by the union of margins of the sheaths of the inferior rectus and the inferior oblique muscles with the medial and lateral check ligaments

Question 27

what is the function of the optic nerve

Answer 27

Senses the incoming light and image displayed on the retina and transmits this image into the cerebral cortex works with oculomotor nerve to change pupil size

Question 28

what does the oculomotor nerve innervate within eye

Answer 28

superior rectus muscle medial rectus muscle inferior rectus muscle inferior oblique muscle levator palpebrae superioris muscle ciliary muscle sphincter muscle.

Question 29

what sinus does the oculomotor nerve pass through

Answer 29

cavernous sinus

Question 30

what does the trochlear nerve innervate in the eye

Answer 30

superior oblique muscle

Question 31

what is the function of the trigeminal nerve in the eye

Answer 31

provides sensory innervation to the eye

Question 32

what does the abducens innervate in the eye

Answer 32

lateral rectus muscle

Question 33

what is the function of the facial nerve in the eye

Answer 33

for eye closure and blinking by the motor innervation of the orbicularis oculi muscle

Question 34

what is the first branch of the ophthalmic artery

Answer 34

central retinal artery

Question 35

what does the central retinal artery supply

Answer 35

nerve fibres in the optic nerve and inner layers of retina

Question 36

what is the largest branch of the ophthalmic artery

Answer 36

lacrimal artery

Question 37

what are the branches of the ophthalmic artery

Answer 37

central retinal artery, lacrimal artery, posterior ciliary arteries, inferior and superior muscular vessels, supraorbital artery, emthoid artery, medial palpebral vessels and terminal artery

Question 38

what does the lacrimal artery supply

Answer 38

eyelids, lacrimal gland, and conjunctiva.

Question 39

what supplies the posterior uveal tract

Answer 39

posterior ciliary arteries

Question 40

what supplies the extraocular muscles

Answer 40

inferior and superior muscular vessels

Question 41

what does the supraorbital artery supply

Answer 41

skin of forehead and levator palpebrae muscle