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42 Cards in this Set
- Front
- Back
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Superior Oblique
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O: Body of sphenoid
I: Sclera A: Medial rotation, depression, abduction N: Trochlear n |
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Superior Rectus
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O: CTR
I: Sclera A: Elevates, adducts, medial rotation N: Oculomotor n |
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Lateral Rectus
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O: CTR
I: Sclera A: Abduction N: Abducent n |
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Inferior Rectus
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O: CTR
I: Sclera A: Depression, adduction, medial rotation N: Oculomotor n |
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Inferior Oblique
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O: Floor of orbit
I: Sclera A: Lateral rotation, elevation, abduction N: Oculomotor n |
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Medial Rectus
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O: CTR
I: Sclera A: Adducts N: Oculomotor n |
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Levator Palpebrae superioris
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O: Lesser wing of sphenoid, anterosuperior optic canal
I: Tarsal plate & upper eyelid A: Elevates eyelid N: Oculomotor n |
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Orbit osteology (7 bones)
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1. Frontal
2. Sphenoid 3. Zygomatic 4. Maxillia 5. Lacrimal 6. Ethmoid 7. Palatine |
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Sty
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Infection of either ciliary or tarsal glands causing blocked excretory ducts
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Chalazion
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Cyst caused by blocked tarsal glands
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Path of tears
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My heart→across eyeballz→lacrimal lake/caruncle→lacrimal puncta→lacrimal cannaliculi→lacrimal sac→nasolacrimal duct
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PNS of Lacrimal Gland
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CN VII (Facial n.)→Greater Petrosal n.→Nerve of Pterygoid Canal→Pterygopalatine Ganglion (Synapse)→Zygomatic n. (CN V2)→Lacrimal n. (CN V1)→ Lacrimal Gland
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Fovea Centralis
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Responsible for sharp central vision
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Dilator pupillae
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SNS innervation
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Ciliary m.
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PNS innervation
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Sphinter pupillae
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PNS innervation
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Intrinsic mm of eye
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-Sphincter pupillae
-Dilator pupillae -Ciliary m. -Act upon suspensory ligaments to dilate/constrict pupil |
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Hyperopia
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-Farsightedness
-Lens thickened -Clear distance vision |
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Myopia
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-Nearsightedness
-Clear near vision -Lens flattened |
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Nerves of the orbit
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-Opthalmic (Frontal→Supraorbital, supratrochlear nn. and Lacrimal)
-Trochlear n. (division of CN IV) |
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Branches of Opthalmic Division of Trigeminal (CN V1)
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-Nasociliary
→Long ciliary nn. →Ethmoidal n. (found medial) →Infratrochlear n. |
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CN III
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Oculomotor
→Short ciliary nn →Ciliary ganglion |
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Visual Field (bilat)
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-Created by part of left eye and part of right and vice versa
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Binocular zone
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-Right eye makes left binocular zone and vice versa
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Pupillary Light Reflex
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-Increase amt of light to one eye will result in contraction of both pupils
-Via CN II for sensory -Via CN III for motor |
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Corneal Reflex
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-Touching the cornea will cause a blink reflex
-Sense via CN V1 -Motor via CN VIII |
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Opthalmic a.
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-Branch of IC that provides blood to eye
-Veins drain to cavernous sinus |
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Lateral Rectus
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Abduction
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Medial Rectus
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Adduction
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Superior Rectus
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Elevation, Adduction, Medial Rotation
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Inferior Rectus
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Depression, Adduction, Lateral Rotation
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Superior Oblique
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Depression, Abduction, Medial Rotation
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Inferior Oblique
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Elevation, Abduction, Lateral Rotation
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Cadaveric position of eyes
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-Since mm. have lost their tone, they will not look straight ahead but in line with the orbits
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Adduction
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Medial Rectus
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Abduction
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Lateral Rectus
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Straight Up
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Superior Rectus
Inferior Oblique |
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Straight Down
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Inferior Rectus
Superior Oblique |
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Lateral and Up
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Lateral Rectus
Superior Rectus |
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Lateral and Down
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Lateral Rectus
Inferior Rectus |
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Medial and Up
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Medial Rectus
Inferior Oblique |
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Medial and Down
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Medial Rectus
Superior Oblique |
