THE ORBIT - ORBITAL APEX (normal anatomy)

Question 1

It is the main portal for all nerves and vessels to the eye

Answer 1

The apex of the orbit

Question 2

The apex of the orbit is the site of origin of all EOMS except?

Answer 2

Inferior Oblique

Question 3

It lies between the body and the greater & lesser wings of the sphenoid bone

Answer 3

Superior Orbital Fissure

Question 4

Where do the superior ophthalmic vein, lacrimal, frontal, and trochlear nerves pass through?

Answer 4

Lateral portion of the Fissure (Lying “outside” the Annulus of Zinn)

Question 5

Where do the oculomotor, abducens and nasociliary nerves pass through?

Answer 5

Medial portion of the fissure (“Within” the Annulus of Zinn)

Question 6

Where do the optic nerve and ophthalmic artery pass through?

Answer 6

Optic Canal (“Within” the Annulus of Zinn)

Question 7

It frequently joins the superior ophthalmic vein before exiting the orbit

Answer 7

Inferior ophthalmic vein

Question 8

Where does the body of the sphenoid lie?

Answer 8

Inferomedial to the annulus of Zinn/ inferior orbital fissure