ORBIT

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ORBIT EYE
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Contents
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Bony Orbit
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• Infection, tumor ??? air sinus ???????????????
• Fracture ???????????????????

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Orbital openings
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Orbital fasciae

• fibrous tissue ?????????????????? orbital
  contents

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Surface anatomy of eyeball and eyelids
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Eyelids
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Eyeball
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Refracting media
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Lacrimal apparatus

• Functions

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Ocular muscles
1. Extraocular muscles of eyeall 1.1 Rectus
muscle Medial, Lateral
Superior, Inferior
2. Intraocular muscles 2.1 Ciliary muscles
2.2 Sphincter pupillae and Dilator
pupillae m.
3. Muscles of eyelids 3.1 Levator pupillae
m. 3.2 Palpebrae muscles of Muller
(smoo th muscle)
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Extraocular muscles
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Vertical axis
Horizontal axis
Antero- posterior axis
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Yoke muscle combination
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Innervation of the orbit
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Optic nerve
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Oculomotor, Trochlear and Abducens nerves (CN.
III, IV, and VI)
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Ophthalmic Division of Trigeminal nerve (CN. V1)
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Automomic nerve supply of eye muscles
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Automomic nerve supply of lacrimal glands
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Blood supply of the orbit