Orbit

Question 0

Contents of Supraorbital Foramen

Answer 0

Supraorbital NAV

Branches from V1, Supraorbital Artery and Vein

Question 1

Contents of Optic Canal

Answer 1

Optic Nerve & Opthalmic Artery

Question 2

Contents of Infraorbital Foramen

Answer 2

Infraorbital NAV

branches from V2 and Maxillary Artery and Vein

Question 3

Contents of Anterior/Posterior Ethmoidal Foramina

Answer 3

Anterior and Posterior Ethmoidal NAV

Branches from V1 and Opthalmic Artery

Question 4

Contents of Inferior Orbital Fissure

Answer 4

Infraorbital and Zygomatic NAV

Branches from V2 and Maxillary Artery/Vein

Question 5

Layers of Eyelid

Answer 5

1. Skin (sebaceous glands, sweat glands)
2. Subcutaneous (sebaceous glands)
3. Orbicularis oculi (palpebral part)
4. Orbital Septum (continuous w/ periosteum)
   Tarsal Plate (glands prevent evaporation of tears)
   Levator Palpebrae superioris (lifts eyelid)
5. Conjunctiva (b/w cornea and eyelids)

Question 6

Sty

Answer 6

Blockage of sebaceous gland in eyelid

Question 7

Chalazion

Answer 7

Blockage of tarsal gland in eyelid

Question 8

Drainage of tears

Answer 8

Tears flow from lacrimal gland across eye to Lacrimal puncta

Pass through lacrimal canaliculi to lacrimal sac

Finally passes through nasolacrimal duct to the inferior meatus of nasal cavity

Question 9

Lacrimal gland innervation

Answer 9

Facial Nerve

Question 10

Prevents excessive rotation of eye

Answer 10

Tenon’s capsule

Question 11

Medial rectus

Answer 11

Adducts eye

*CN III

Question 12

Lateral rectus

Answer 12

Abducts eye

*CN VI

Question 13

Superior rectus

Answer 13

Raises eye

Adducts eye

Medial rotation

*CN III

Question 14

Inferior Rectus

Answer 14

Lowers eye

Abducts eye

Lateral rotation

*CN III

Question 15

Superior oblique

Answer 15

Abducts eye

Lowers eye

Medial rotation

CN IV

Question 16

Inferior oblique

Answer 16

Raises eye

Abducts eye

Lateral rotation

*CN III

Question 17

Occlusion of central artery of retina

Answer 17

Blindness

Question 18

Papilledema

Answer 18

engorgement of retinal veins

Question 19

Increased CSF around optic nerve

Answer 19

Decreased vision; headaches

-Insidious onset

Question 20

Abducens Nerve Damage

Answer 20

Damaged lateral rectus

=>medial strabismus

Question 21

Trochlear Nerve Damage

Answer 21

Damaged superior oblique

Eye rotates laterally; pt. tilts head in opposite direction to compensate

-Also will have difficulty walking down stairs

Question 22

Occulomotor Nerve Damage

Answer 22

3 Symptoms:

1. Lateral Strabismus (damaged medial rects)
2. Ptosis (damaged levator palpebrae superioris)
3. Mydriasis (damaged pupillary constrictor)