Eye and Orbit

Question 1

What is contained in the lacrimal canuncle?

Answer 1

sebecous glands

Question 2

What is the lacrimal punctum an opening to?

Answer 2

Lacrimal canal

Question 3

Bones of the orbit

Answer 3

Frontal
Zygomatic
Maxilla
Lacrimal
Sphenoid
Ethmoid
Palatine

Question 4

Passageways on orbit

Answer 4

Optic canal
S. orbital fissure
I. orbital fissure Foramens

Question 5

Extraocular muscles

Answer 5

Medial rectus Superior oblique Lateral rectus
Inferior oblique Superior rectus
Inferior rectus

Question 6

Innervation of superior oblique

Answer 6

trochlear nerve

Question 7

Innervation of lateral rectus

Answer 7

abducens

Question 8

Innervation of S. rectus, I. rectus, and I oblique

Answer 8

Occulomotor

Question 9

What is inside optic canal?

Answer 9

CN2, ophthalmic artery

Question 10

What is inside S. orbital fissure?

Answer 10

CN3, 4, 5, 6

S. ophthalmic vein

Question 11

What is inside I. orbital fissure?

Answer 11

CN5

I. ophthalmic vein

Question 12

What is within ring in orbit?

Answer 12

CN2, 3, 5, 6

Ophthalmic artery – S. ophthalmic vein

Question 13

Superior rectus M

Answer 13

Looks laterally and upwards (elevation, intorsion, and adduction)

Question 14

Inferior rectus M

Answer 14

Looks laterally and downwards (depression, extorsion, and adduction)

Question 15

Lateral rectus M

Answer 15

Looks laterally (abduction)

Question 16

Medial rectus M

Answer 16

Looks medially (adduction)

Question 17

Inferior oblique M

Answer 17

Looks medially and upwards (intorsion, depression, and abductor)

Question 18

Superior oblique M

Answer 18

looks medially and downwards (extorsion, elevation, and abduction)

Question 19

Arterial supply of extraocular muscles

Answer 19

Ophthalmic artery
Central retinal artery Supraorbital artery
Lacrimal artery

Question 20

Central retinal artery

Answer 20

Small artery to supply the nerve and retina tissue

Question 21

Central retinal artery occlusion (CRAO)

Answer 21

sudden painless loss of vision

Question 22

Intrinsic muscles of the eye

Answer 22

ciliary muscle, sphincter pupillae, dilator pupillae

Question 23

Ciliary muscle IM

Answer 23

Parasympathetic (CN3)
Lens become round
Constrict ciliary body
Loosen the zonular fibers

Question 24

Sphincter pupillae IM

Answer 24

Short ciliary nerve
Parasympathetic (CN3)
Constricts pupil

Question 25

Dilator pupillae

Answer 25

Long ciliary nerve Sympathetic (CNV1) Dilates pupil

Question 26

Test to see if lateral rectus if damaged

Answer 26

Look lateral

Question 27

Test to see if superior rectus if damaged

Answer 27

look out then up

Question 28

Test to see if superior oblique if damaged

Answer 28

look in then down

Question 29

Test to see if medial rectus if damaged

Answer 29

look medial

Question 30

Test to see if inferior rectus if damaged

Answer 30

look out then down

Question 31

Test to see if inferior oblique if damaged

Answer 31

look in then up