1. ORBIT

2. Bones of Orbit: Roof Bones: Related to: Special features:
Frontal bone.
Lesser wings of sphenoid.
Related to:
Frontal cerebral lobes.
Special features:
Fossa for lacrimal gland.

3. Bones of Orbit: Floor Bones: Related to: Special features: Maxilla.
Zygomatic.
Related to:
Maxillary sinus.
Special features:
Infraorbital groove and canal:
Infraorbital nerve.
Infraorbital artery.

4. Bones of Orbit: Medial Wall
Ethmoid.
Lacrimal.
Frontal.
Sphenoid.
Related to:
Ethmoid air cells.
Sphenoid sinus.
Nasal cavity.

5. Bones of Orbit: Medial Wall
Special features:
Fossa for lacrimal sac.
Opening for nasolacrimal canal.

6. Bones of Orbit: Lateral Wall
Zygomatic.
Greater wing of sphenoid.
Frontal.
Related to:
Temporal fossa.

7. Eye External features: Conjunctiva. Eyelids: Lacrimal apparatus:
Tarsal plates.
Tarsal glands.
Lacrimal apparatus:
Lacrimal papilla and puncta.
Lacrimal canaliculi and sac.
Nasolacrimal duct.

8. Openings into Orbit Superior orbital fissure: Cranial nerves:
III.
IV.
V-1 (ophthalmic branch).
Frontal.
Lacrimal.
Nasociliary.
VI.
Superior ophthalmic vein.

9. Openings into Orbit Optic canal:
CN II.
Ophthalmic artery.
Anterior and posterior ethmoidal foramina:

10. Openings into Orbit Inferior orbital fissure: Cranial nerves:
V-2: (maxillary branch):
Zygomatic branch.
Orbital branches.
Infraorbital nerve.

11. Openings into Orbit Nasolacrimal duct. Infraorbital groove:
Infraorbital nerve.
Supraorbital notch:
Supraorbital nerve.

12. Extrinsic Muscles of the Eye
Common annular tendon.
Superior oblique:
CN IV.
Inferior oblique:
CN III.
Superior rectus:
Inferior rectus:

13. Extrinsic Muscles of the Eye
Medial rectus:
CN III.
Lateral rectus:
CN VI.
Levator palpebrae superioris:

14. Intrinsic Muscles of the Eye
Parasympathetics:
From:
Edinger-Westphal nucleus.
To:
Ciliary ganglion.
Sphincter pupillae.

15. Intrinsic Muscles of the Eye
Sympathetics:
From:
T1.
To:
Superior cervical ganglion.
Dilator pupillae:
Wraps around carotid artery.

16. Lacrimal Gland Parasympathetics: From: To: Lacrimal nucleus:
Via CN VII.
To:
Sphenopalatine ganglion.
Lacrimal gland:
Via CN V.

17. Lacrimal Gland Sympathetics: From: To: T1. Superior cervical ganglion.

18. Sensory Supply to Orbit
Optic nerve.
Lacrimal nerve.
Frontal nerve.
Nasociliary nerve.
Branches of V-2.