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38 Cards in this Set

  • Front
  • Back
bones of the orbit
frontal
ethmoid
lacrimal
maxilla
zygomatic
sphenoid
palatine
sclera
maintains shape of eyeball
insertion of extraocular m
peirced by optic n
cornea
major refractive structure
transparent and avascular
won't be rejected in transplants
fibrous tunic
sclera
cornea
vascular tunic
choroid
cillary body
iris
choroid
dense capillary plexus with pigment cells
btwn sclera and retina
cillary body
produces aqueous humor
suspends the lens via zonule fibers
contains cillary muscles
cillary muscles
control lens shape
parasymp -> contraction -> dec tesion on zonule fibers -> inc lens curvature
iris
highly pigmented diaphragm
sphincter pubillae m & cillary m
preganglionic parasympathetic from edinger-westphal nuc
synapase in cillary ganglion
postganglionic fibers pass via short cillary V1
*pupil constriction & lens thickening for near vision
dilator pupillae & superior tarsal m
sympathetic vis CN III & V1
dilate pupil adn widen palpebral fissure
nasolacrimal duct
within nasolacrimal canal
carries lacrimal fluid to inferior nasal meatus
ophthalmic a
branch of internal carotid
enters orbit via optic canal
crosses optic n
central a of retina
internal carotid
runs w/in dural sheath of
optic n
supplies retina
enters optic n's inferior surface
lacrimal a
internal carotid
supplies lacrimal gland,
conjunctiva & eyelids as
palpebral aa
anastomoses w zygoaticoorbial & facial aa branches of external carotid
supraorbital a
internal carotid
passes through supraorbial fissure
supplies skin of forehead, scalp and frontal sinus
supratrochlear a
internal carotidterminal branch
supplies skin & muscles of forehead, scalp & pericardium
dorsal nasal a
internal carotidterminal branch
supplies lacrimal sac & skin of nose
anastomses w external carotid via infraorbital
posterior and anterior ethmoidal aa
internal carotid
supply ethmoidal air sinus, frontal sinus, lateral nasal wall, nasal septum, meningeal branches
infraorbital a
external carotid
branch of maxillary
branches w/in infraorbital canal to supply inferior rectus, inferor oblique & lacrimal sac
anastomoses w/ dorsal nasal & facial
zygomatico-orbital a
external carotid
branch of superficial temporal
supplies orbicularis oculi m
anastomoses w/ lacrimal a
facial a
external carotid
anastomoses w/ dorsal nasal and infrorbital
transverse facial a
external carotid
anastomoses w/ infaorbital and lacrimal aa
central vein of retina
w/in optic nerve
drains into cavernous sinus or superior ophthalmic v
superior ophthalmic vein
communicates w/ facial & supraorbital vv
passes through superior orbital fissure
drains into cavernous sinus
inferior ophthalmic vein
recieves blood from inferior & medial parts of orbit
connects w/ superior ophthalmic or drains via inferior orbital fissure into pterygoid plexus
sympathetic innervation of lacrimal gland
vasoconstriction
parasympathetic innervation of the lacrimal gland
secretion
Levator palpebrea
raises upper eyelid
oculomotor
medial rectus
adducts
oculomotor
lateral rectus
abduction
abducent
superior rectus
1 elevation
2 adduction
3 intorsion
oculomotor
inferior rectus
1 depression
2 adduction
3 extorsion
oculomotor
superior oblique
abduction, depression, intorsion
trochlear
inferior oblique
abduction, elevation, extorsion
oculomotor
injury to greater petrosal n
loss of lacrimation
sympathetic nerve injury
pupil constricion (miosis)
ptosis
anhydrosis (lack of sweating)
erythematosis (blushing)
parasympathetic nerve injury
pupil dialation
loss of accommodation