eye Flashcards
bones in the orbit
frontal, maxillary, zygomatic, sphenoid, ethmoid, lacrimal, palatine
ethmoid fracture may create a conduit to
ethmoid sinus
orbital floor fractures may create a conduit to
maxillary sinus
blowout fracture to floor causes
vertical diplopia
orbicularis oculi does _ and innervated by _
closes eye, innervated by CN 7
voluntary muscle of eyelid
levator palpebrae
levator palpebrae innervated by
CN 3
involuntary muscle of eyelid
superior tarsal
complete ptosis
loss of CN3- inability to open eye
partial ptosis
loss of sympathetic innervation- horner’s syndrome
orbital septum is an extension of
periosteum
Tarsus
provides support and determines eyelid form, elevates eyelid
stye
painful inflammation of sebaceous gland or sweat gland of the eyelash
chalazion
inflammation of tarsal gland, frequently painless
eyelids arteries
ophthalmic, facial, superficial temporal
lacrimal gland sympathetic
plexus on ICA, deep petrosal, nerve of pterygoid canal, through pterygopalatine ganglia
lacrimal gland parasympathetic
lacrimal nucleus, greater petrosal, nerve of the pterygoid canal, pterygopalatine ganglia
extrinsic eye muscles
levator papebrae superioris, superior oblique, superior rectus, lateral rectus, medial rectus, inferior rectus, inferior oblique
intrinsic eye muscles
ciliary muscle, sphincter pupillae, dilator pupillae
4 rectus muscles from
common tendinous ring
LR6SO4 stands for
Lateral rectus 6, superior oblique 4
arterial supply of orbit
ophthalmic artery
venous drainage of orbit
superior and inferior ophthalmic veins
innervation of the orbit
CN 2,3,4,5
oculomotor nerve palsy
ptosis of upper eyelid, pupil down and out, mydriasis, loss of accommodation
