The anatomy of the eye and the orbit- anatomy.tv worksheet

The orbit

Look at the orbit, how many different bones are involved?

Find the superior orbital fissure. What bone is it in? What passes through the fissure?

The bones of the orbit (anatomy.tv)

Optic nerve

Follow the path of the optic nerve.

Look at the paths of other cranial nerves that are in the immediate location and that are important, namely the oculomotor, trochlear, abducent and trigeminal (ophthalmic branch) nerves.

The optic nerve (anatomy.tv)

Muscles

Find each of the six extrinsic muscles of the eye. You can work out the action of each muscle, but also note the motor innervation to each muscle. Which muscles are innervated by the abducent and trochlear nerves?

Watch the movies for the inferior and superior oblique muscles.

Identify the muscles involved in keeping the eyelids open.

The extra-ocular muscles (anatomy.tv)

Blood vessels

Look at the blood vessels of the orbit. Note the supra-trochlear and supra-orbital arteries. Can you find the infra-orbital artery and its branches?

Internal venous drainage occurs through a vein that does not follow the path of the arteries. Can you find it? What is it called?

What are the tributaries of the facial vein around the eye?

Blood vessels of the orbit (anatomy.tv)