1. ORBIT
R. Shane Tubbs, MS, PA-C, PH.D.

2. BONY ORBIT

3. Supraorbital notch (foramen)
Posterior ethmoidal foramen
Frontal bone
Anterior ethmoidal foramen
Orbital plate of ethmoid bone
(lamina papyracea)
Lesser wing of sphenoid
Lacrimal bone
Superior orbital fissure
Fossa of lacrimal sac
Optic canal
Orbital process of
palatine bone
Greater wing of sphenoid
Zygomatic bone
Inferior orbital fissure
Maxillary bone
Infraorbital groove
& foramen

5. Brain
Frontal sinus
Ethmoidal cells
Maxillary sinus

6. Ethmoidal cells
Nasal septum
Temporalis m.
(in temporal fossa)
Brain (in middle cranial fossa)
Optic n.
Sphenoidal sinuses
Medial wall of orbit

8. SHEATHS OF THE OPTIC NERVE
Central a. & v. of retina
Pia
Arachnoid
Dura
Subarachnoid space
(Intervaginal space)

9. Optic disc

10. MUSCLES

11. INTRINSIC MUSCLES OF EYEBALL
Cornea
Sclera
Iris folds
Lens
Ciliary m.
(accommodation)
Dilator m. of pupil
(mydriasis)
Fibers of ciliary zonule
(suspensory lig. of lens)
Ciliary body
Sphincter m. of pupil
(miosis)

13. MUSCLES OF THE UPPER EYELID
Levator palpebrae superioris
Superior tarsal muscle

14. Superior oblique m.
Levator palpebrae superioris m.
Trochlea (pulley)
Superior rectus m.
Medial rectus m.
Common annular tendon
Lateral rectus m. (cut)
Inferior rectus m.
Inferior oblique m.

15. Superior tarsal plate
Trochlea
Levator palpebrae superioris m.
Superior oblique m.
Superior rectus m. (cut)
Medial rectus m.
Lateral rectus muscle
Inferior rectus m.
Superior rectus m. (cut)
Levator palpebrae superioris m. (cut)

16. MOVEMENTS AROUND THE VERTICAL AXIS
Inferior oblique
Superior oblique
Medial rectus
Superior rectus
Lateral rectus
Inferior rectus
ADDUCTORS
ABDUCTORS

17. MOVEMENTS AROUND THE LATEROMEDIAL (TRANSVERSE) AXIS
Inferior oblique
Superior oblique
Superior rectus
Inferior rectus
ELEVATORS
DEPRESSORS

18. MOVEMENTS AROUND THE A-P AXIS
Superior rectus
Superior oblique
INTORSION
Inferior rectus
Inferior oblique
EXTORSION

19. SO4, LR6, R3

20. ABDUCENT NERVE INJURY

21. PERIORBITA & FASCIA

22. Medial check ligament
Lateral check ligament
Periorbita
Periorbita
Medial rectus muscle
and sheath
Bulbar sheath
(Tenon’s capsule)
Lateral rectus muscle
and sheath
Orbital fat

23. NERVES

24. L N F
N. F. L.

26. POSITION OF CILIARY GANGLION
Optic nerve
Lateral rectus
Ciliary ganglion
Short ciliary nerves

27. VESSELS

28. Medial palpebral a.
Lateral palpebral a.
Supratrochlear a.
Dorsal nasal a.
Supraorbital a.
Anterior ethmoidal a.
Posterior ciliary aa.
Posterior ethmoidal a.
Continuation of ophthalmic a.
Lacrimal a.
Muscular branch
Central a. of retina
Ophthalmic a.
Internal carotid a.

29. Supratrochlear v.
Supraorbital v.
Superior ophthalmic v.
Angular v.
Cavernous sinus
Vorticose vv.
Facial v.
Inferior ophthalmic v.
Pterygoid plexus