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21 Cards in this Set
- Front
- Back
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Define Bony Orbit |
Cone shaped structure that serves to surround and protect the eyeball. |
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How many bones make up the orbit? |
7 bones |
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What are the 7 bones that make up the orbit? |
1. Frontal 2. Sphenoid 3. Maxillary 4. Lacrimal 5. Zygoma 6. Ethmoid 7. Palatine |
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Irregular, spherical shaped structure in the bony orbit. |
Globe of the Orbit |
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Small cavity anterior to the lens. |
Anterior Compartment of Globe |
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What is the anterior compartment filled with? |
Aqueous Humor |
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What surrounds the larger posterior compartment of the globe? |
Retina |
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Jelly-like substance within the posterior compartment of the globe. |
Vitreous Humor |
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Gland located in the superolateral portion of the orbit. |
Lacrimal Gland |
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Six Major Muscles of the Orbit |
1. Superior rectus 2. Inferior rectus 3. Medial rectus 4. Lateral rectus 5. Superior oblique 6. Inferior oblique |
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Superior Rectus Function |
Elevates eye. |
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Inferior Rectus Function |
Depresses eye. |
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Medial Rectus Function |
Adducts eye. |
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Lateral Rectus Function |
Abducts eye. |
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Superior Oblique Function |
Depresses eye in adduction. |
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Inferior Oblique Function |
Elevates eye in adduction. |
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The nerve of sight. Originates at the posterior surface of the globe and courses posteromedially to exit the orbit through the optic canal. |
Optic Nerve |
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Artery that runs inferior to the optic nerve but crosses over the nerve to supply the globe. |
Ophthalmic Artery |
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Vein that originates from the medial orbit and courses below the superior rectus muscle. |
Superior Ophthalmic Vein |
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Surrounds the muscular and vascular structures within the orbit. Allows visualization of structures in images. |
Retro-orbital Fat |
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The decussation of the medial fibers. |
Optic Chiasm |
