Session 8 - The Eye Flashcards Preview

Head, Neck and Neuroanatomy > Session 8 - The Eye > Flashcards

Flashcards in Session 8 - The Eye Deck (8):
1

What three openings are found at the apex of the orbital cavity?

Superior orbital fissure
Inferior orbital fissure
Optic canal

2

What are the bones forming the walls of the orbit?

Floor:
- maxilla
- zygomatic

Medial wall:
- maxilla
- lacrimal
- ethmoid
- sphenoid

Roof:
- frontal
- sphenoid

Lateral wall:
- zygomatic
- sphenoid

3

Which walls of the orbit are the most vulnerable to fracture?

Medial wall and floor - thinnest.
Most common wall to fracture is the floor.

4

How might a fracture of the floor of the orbit occur?

Direct impact to the front of the eye (e.g. by a ball or fit) causing an orbital blow-out fracture due to sudden increase in orbital pressure.

5

How will and orbital blow-out fracture present?

History of trauma to eye/orbit
Periorbital swelling, painful
Double vision (especially on vertical gaze)
Impaired vision
Anaesthesia over affected cheek (upper teeth and gums) on affected side

6

In an orbital blow out fracture, blood and orbital contents can prolapse into which sinus?

Maxillary sinus

7

What are the contents of the orbital cavity?

Globe of the eye (eyeball)
Extra-ocular muscles
Lacrimal apparatus
Nerves and blood vessels
Orbital fat

8

What is another name for eyelids?

Palpebrae