1- Orbit and Ocular Adnexa

Question 1

Hauteur, largeur de l’entrée orbitaire et profondeur de l’orbite

Answer 1

Hauteur : 35 mm
Largeur : 45 mm (plus large 1 cm derrière la marge orbitale antérieure)
Profondeur : 40-45 mm (lateral vs medial wall)

Question 2

What is the most direct path to the optic nerve ?

Answer 2

Along the medial wall

Question 3

Site de fracture le plus commun suite à un trauma contondant de l’orbite ?

Answer 3

orbital plate of the ethmoid bone (lamina papyracea)

Question 4

Which of the extraocular muscle is the only one that does not originate from
the orbital apex ?

Answer 4

Inferior oblique muscle

(Arise from the floor of the orbit just lateral to the opening of the nasolacrimal canal)