Eye, 9 Oct 2006
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Courtney Takahashi Anatomy 6 – Eyeball 9 October 2006 Eyeball Fun Identify: Osteology: Frontal Bone • Supraorbital notch • Orbital surface Lacrimal fossa • Posterior lacrimal crest • Lacrimal groove Ethmoid bone Maxilla • Anterior lacrimal crest • Infraorbital groove • Infraorbital foramen Zygomatic bone Sphenoid bone • Optic canal • Lesser wing • Superior orbital fissure • Greater wing Surface anatomy • Eyelashes (cilia) • Palpebral fissure (eyelid opening) • Medial and lateral palpebral commisures (joining of upper and lower eyelids) • Medial and lateral angles (medial and lateral corners of the eye) • Sclera (white of eye) • Cornea (Transparent anterior) • Iris • Pupil • Lacrimal caruncle • Lacrimal lake • Lacrimal papilla • Lacrimal puncta • Bulbar conjuntica (membrane that lines the surface of the eyball) • Palpebral conjunctiva (membrane that lines the inner surface of the eyelid) • Superior and inferior conjunctival fornices (areas where the bulbar conjuntiva and palpebral conjunctiva meet)
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Conjunctival sac (potential space between the bulbar conjuntiva and palpebral conjunctiva
Deeper structures • Orbital septum • Tarsal plates • Lacrimal glands • Lacrimal canaliculi • Naslacrimal duct (just be aware of existence) • Common tendinous ring Nerves • • • • • • • • • •
Frontal nerve Lacrimal nerve Trochlear nerve CN III CN IV CN VI Long ciliary nerves Anterior ethmoidal nerves Ciliary ganglion Trochlea
Arteries • Nasociliary artery • Ophthalmic artery Muscles 1. Superior rectus 2. Superior Oblique 3. Medial Rectus 4. Lateral Rectus 5. Inferior Rectus 6. Inferior Oblique 7. Levator palpebrae superioris muscle Coronal Section of Eyeball • Fibrous outer layer – sclera and cornea • Vascular middle layer – Choroid, ciliary body, iris • Inner layer – Retina, may be detached • Macula • Optic disc • Lens What are the 3 layers of the eye?
1. Outer fibrous layer (sclera and cornea) 2. Middle vascular layer (choroid, ciliary body, iris). Lens is CT behind 3. Inner nerve layer (retina)
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Conjunctival sac (potential space between the bulbar conjuntiva and palpebral conjunctiva
Deeper structures • Orbital septum • Tarsal plates • Lacrimal glands • Lacrimal canaliculi • Naslacrimal duct (just be aware of existence) • Common tendinous ring Nerves • • • • • • • • • •
Frontal nerve Lacrimal nerve Trochlear nerve CN III CN IV CN VI Long ciliary nerves Anterior ethmoidal nerves Ciliary ganglion Trochlea
Arteries • Nasociliary artery • Ophthalmic artery Muscles 1. Superior rectus 2. Superior Oblique 3. Medial Rectus 4. Lateral Rectus 5. Inferior Rectus 6. Inferior Oblique 7. Levator palpebrae superioris muscle Coronal Section of Eyeball • Fibrous outer layer – sclera and cornea • Vascular middle layer – Choroid, ciliary body, iris • Inner layer – Retina, may be detached • Macula • Optic disc • Lens What are the 3 layers of the eye?
1. Outer fibrous layer (sclera and cornea) 2. Middle vascular layer (choroid, ciliary body, iris). Lens is CT behind 3. Inner nerve layer (retina)
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