Kavita_Orbit - Diseases of Orbit Dr Kavita Kumar Associate...

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Diseases of Orbit Dr Kavita Kumar Associate Professor Dr Sanjay Shrivastava Professor Department of Ophthalmology Gandhi Medical College Bhopal
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Anatomical considerations Walls Apex Openings Spaces Relations Blood vessels 12/24/11 2
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Orbital Cavity Dimensions- conical in shape Depth- 40 mm Height- 35 mm Width- 40mm 12/24/11 3
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Anatomy of Orbit Sketch of orbit by Dr Sanjay Shrivastava Frontal Ethamoid Zygomatic Lesser and Greater wing of Sphenoid Maxillary Lacrimal Palatine Optic Foramen Sup Orbital Fissure
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Anatomy of Apex of Orbit Sketch of Apex of Orbit by Dr Sanjay Shrivastava Sup Orbital Fissure Annulus of Zinn Med Rectus Muscle Inf Rectus Muscle Lat Rectus Mus LPS Sup Oblique Mus Optic Nerve
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Walls Roof- is formed by the orbital plate of frontal bone and lesser wing of sphenoid Floor- is formed by the maxillary bone- orbital plate and maxillary process of zygomatic bone and orbital process of palatine bone Medial wall- is formed by the lacrimal and ethamoidal bone, frontal process of maxillary bone and body of sphenoid Lateral wall- is formed by the greater wing of sphenoid and zygomatic bone 12/24/11 6
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Apex Annulus of zinn giving rise to origin to extra ocular muscles Optic canal Part of superior orbital fissure 12/24/11 7
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Openings Optic canal- optic nerve with meninges and ophthalmic artery Superior orbital fissure- Outside tendinous ring – structures passing outside are: Lacrimal nerve –V1 Frontal nerve -V2 Trochlear nerve Superior and inferior veins 12/24/11 8
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Opening Inside tendinous ring- structures passing inside the ring are - Oculomotor (3 rd cranial nerve) upper division Nasociliary nerve Abducent nerve (6 th cranial nerve) Oculomotor lower division (3 rd cranial nerve) Inferior orbital fissure-inferior ophthalmic vein 12/24/11 9
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Opening Foramen rotandum - maxillary nerve Superior orbital notch-supraorbital nerve and vessels Infra orbital foramen-infraorbital nerve and artery 12/24/11 10
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Spaces Subperiostial space Peripheral orbital space Central space Tenons space 12/24/11 11
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Relations Frontal sinus Sphenoidal sinus Maxillary sinus Ethamoidal air cells 12/24/11 12
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Common lesions Proptosis Exophthalmos- endrocrinal Enophthalmos Pseudoproptosis-slight prominence of eyes like myopia, paralysis of extra ocular muscles, obese people, mullers stimulation by cocain 12/24/11 13
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Abnormal protrusion of eye ball is called proptosis or exophthalmos. The term exophthalmos is reserved for
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This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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Kavita_Orbit - Diseases of Orbit Dr Kavita Kumar Associate...

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