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Atlas - Orbit and contents

Greater wing of sphenoid bone
Greater wing of sphenoid bone
Lesser wing of sphenoid bone
Lesser wing of sphenoid bone
Common tendinous ring
Common tendinous ring
Internal carotid artery
Internal carotid artery
Central retinal artery
Central retinal artery
Dorsal nasal artery
Dorsal nasal artery
Short posterior ciliary arteries
Short posterior ciliary arteries
Long posterior ciliary arteries
Long posterior ciliary arteries
Anterior ethmoidal artery
Anterior ethmoidal artery
Posterior ethmoidal artery
Posterior ethmoidal artery
Infraorbital artery
Infraorbital artery
Lacrimal artery
Lacrimal artery
Maxillary artery
Maxillary artery
Ophthalmic artery
Ophthalmic artery
Supraorbital artery
Supraorbital artery
Supratrochlear artery
Supratrochlear artery
Anterior chamber
Anterior chamber
Posterior chamber
Posterior chamber
Optic canal
Optic canal
Capsule of lens
Capsule of lens
Choroid
Choroid
Major arterial circle of iris
Major arterial circle of iris
Minor arterial circle of iris
Minor arterial circle of iris
Cornea
Cornea
Ciliary body
Ciliary body
Vitreous body
Vitreous body
Dura mater
Dura mater
Orbital surface of maxilla
Orbital surface of maxilla
Orbital surface of frontal bone
Orbital surface of frontal bone
Orbital surface of zygomatic bone
Orbital surface of zygomatic bone
Inferior orbital fissure
Inferior orbital fissure
Infraorbital foramen
Infraorbital foramen
Supraorbital notch
Supraorbital notch
Iris
Iris
Crystalline lens
Crystalline lens
Maxilla
Maxilla
Levator palpebrae superioris muscle
Levator palpebrae superioris muscle
Inferior oblique muscle
Inferior oblique muscle
Superior oblique muscle
Superior oblique muscle
Inferior rectus muscle
Inferior rectus muscle
Lateral rectus muscle
Lateral rectus muscle
Medial rectus muscle
Medial rectus muscle
Superior rectus muscle
Superior rectus muscle
Abducens nerve
Abducens nerve
Anterior ethmoidal nerve
Anterior ethmoidal nerve
Posterior ethmoidal nerve
Posterior ethmoidal nerve
Infraorbital nerve
Infraorbital nerve
Lacrimal nerve
Lacrimal nerve
Maxillary nerve
Maxillary nerve
Nasociliary nerve
Nasociliary nerve
Oculomotor nerve
Oculomotor nerve
Ophthalmic nerve
Ophthalmic nerve
Optic nerve
Optic nerve
Supraorbital nerve
Supraorbital nerve
Trigeminal nerve
Trigeminal nerve
Trochlear nerve
Trochlear nerve
Zygomatic nerve
Zygomatic nerve
Ethmoid bone
Ethmoid bone
Frontal bone
Frontal bone
Lacrimal bone
Lacrimal bone
Sphenoid bone
Sphenoid bone
Optic part of retina
Optic part of retina
Muscular branches of ophthalmic artery
Muscular branches of ophthalmic artery
Inferior branch of oculomotor nerve
Inferior branch of oculomotor nerve
Superior branch of oculomotor nerve
Superior branch of oculomotor nerve
Sclera
Sclera
Cavernous sinus
Cavernous sinus
Posterior intercavernous sinus
Posterior intercavernous sinus
Inferior petrosal sinus
Inferior petrosal sinus
Superior petrosal sinus
Superior petrosal sinus
Sigmoid sinus
Sigmoid sinus
Venous sinus of sclera
Venous sinus of sclera
Bulbar conjunctiva
Bulbar conjunctiva
Vorticose veins
Vorticose veins
Inferior ophthalmic vein
Inferior ophthalmic vein
Superior ophthalmic vein
Superior ophthalmic vein
Superior ophthalmic vein
Superior ophthalmic vein

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The skeletal cavity that surrounds the soft tissues that make up the eye is known as the bony orbit. Bones that contribute to the formation of the bony orbit include orbital part of the frontal bone, the frontal process of the maxilla, the facial portion of the zygomatic bone, the lacrimal bone, the vertical plate of the ethmoid bone, the sphenoid bone and the orbital process of the palatine bone.

The bony orbit protects a large part of the eye as well as provides a stable and enclosed environment for the eyeball and its related structures.

The extraocular muscles that are responsible for eye movement are also protected by the bony orbit. These muscles are the superior rectus, inferior rectus, lateral rectus, medial rectus, superior oblique and inferior oblique muscles. They are innervated by the occulomotor nerve (CN III), the trochlear nerve (CN IV) and the abducens nerve (CN VI). The rectus muscles of the eye and the superior oblique muscle have their origin from a common tendinous ring known as the Annulus of Zinn, where are the inferior rectus muscle has its origin on the maxillary bone. However, all the extraocular muscles insert on the eyeball.
Other nerves that supply the soft tissue of the eye are the optic nerve (CN II) and the ophthalmic nerve (CN V1).

The ophthalmic artery, which is the first branch that arises from the internal carotid artery, supplies the eyeball and muscles of the eyeball via its numerous branches.

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