Quiz on Orbital Anatomy

What is the shape of the orbital cavity?

• Cylindrical

• Cone-shaped

• Pyramidal

• Spherical

The base of the orbit is located:

• Posteriorly

• Medially

• Anteriorly

• Inferiorly

The apex of the orbit is associated with which structure?

• Lacrimal gland

• Cornea

• Optic canal

• Retina

What is the periorbita?

• Muscle surrounding the orbit

• Fat in the orbital cavity

• Periosteum lining the orbit

• Retina layer

Which cranial nerve does not pass through the superior orbital fissure?

• CN II

• CN III

• CN IV

• CN VI

Which nerve supplies the superior oblique muscle?

• Oculomotor nerve (CN III)

• Abducens nerve (CN VI)

• Trochlear nerve (CN IV)

• Facial nerve (CN VII)

What nerve innervates the lateral rectus muscle?

• Oculomotor nerve

• Trigeminal nerve

• Trochlear nerve

• Abducens nerve

What muscle elevates the eye and is innervated by CN III?

• Lateral rectus

• Inferior rectus

• Superior rectus

• Superior oblique

The fibrous layer of the eyeball includes:

• Iris and choroid

• Retina and sclera

• Cornea and sclera

• Retina and iris

Which part of the vascular layer controls pupil size?

• Retina

• Iris

• Cornea

• Sclera