Orbital Region Diagrams (2nd Year Secondary)

ORBITAL REGION Contents Of The Orbit ❑ Eyeball ❑ Fascia: Orbital and bulbar. ❑ Muscles: muscles of the eye lids extrinsic muscles of the eye ball intrinsic muscles of the eye ball ❑ Vessels: Ophthalmic artery Superior and inferior ophthalmic vein...

ORBITAL REGION Contents Of The Orbit ❑ Eyeball ❑ Fascia: Orbital and bulbar. ❑ Muscles: muscles of the eye lids extrinsic muscles of the eye ball intrinsic muscles of the eye ball ❑ Vessels: Ophthalmic artery Superior and inferior ophthalmic vein No lymphatic vessels ❑ Nerves: Optic, Oculomotor, Trochlear, Abducent, Branches of ophthalmic nerves and sympathetic nerves. ❑ Ciliary ganglion ❑ Lacrimal gland and lacrimal sac ❑ Orbital fat. 1.ORBITAL BONE MARGINS WALLS OPENINGS 2.NERVES SUPPLY OF THE ORBITAL REGION 1. Optic Nerve 2. Lacrimal Nerve OPHTHALMIC 3. Frontal Nerve DIVISION OF TRIGEMINAL 4. Nasociliary Nerve NERVE 5. Trochlear Nerve 6. Oculomotor Nerve 7. Abducent Nerve 8. SYMPATHETIC FIBERS 9. PARASYMPATHETIC FIBERS 10. Maxillary division of 5th cranial nerve and its zygomatic branch 3. ARTERIAL SUPPLY OF THE ORBITAL REGION: 4.VENOUS DRAINAGE OF THE ORBITAL REGION 5. Lacrimal Apparatus Lacrimal Gland 6.Fascial Sheath of the Eyeball & Fat  7.The Eyelids Structure Movement s  8.Extra-ocular Muscles(EOM) 6 in NO. 4 recti & 2 obliques SR IR MR LR SO IO 9.Interinsic Muscles of orbital region Sphincter pupillae :constricts pupil (parasympathetic via 3rd cranial Dilator pupillae : dilates pupil (sympathetic via nasocillary nerve) Ciliary muscle :control shape of lens in accommodation ( parasympathetic 3rd cranial nerve) Structure of the eye