Ophthalmology Anatomy Flashcards
what ligament holds the eye in place? what else does?
suspensory ligament orbital fat
features of a # zygoma? why?
diplopia eye drops into socket due to suspensory ligament attachments
cornea reflex ?
afferent (sensory) is CN V(1) efferent is CNVII
what is the vestibuloocular reflex?
eyes move away from direction of head movement
what is the oculocardiac reflex?
bradycardia when there is increased tension on extraocular muslces
parasympathetic affects on the eye?
ciliary muscles relax lens becomes thin able to see close up
sympathetic affects on the eye?
ciliary muscles contract lens becomes short and fat able to see far away
CNs from midbrain?
III IV
CNs from pons?
V VI VII VIII
CNs from medulla?
IX X XI XII
what does CNIII supply?
SR, MR, IR, IO LPS sphincter pupillae
supply of lacrimal gland?
lacrimal nerve (branch of CNV1)
Supply of SO and LR?
SO - CNIV LR - CNVI
supply of orbicularis oculi?
CN VII
what are the components of orbicularis oculi? what do they do?
palpebral - blink orbital - close tightly
what produces CSF?
choroid plexus
layers of the meninges?
dura arachnoid pia
route of CSF?
lateral ventricles 3rd 4th subarachnoid space
what do rods do?
see in dim light
what do cones do?
see in normal light
what makes up the uvea?
iris choroid ciliary body
where do the rectus eye muscles originate from?
common tendinous ring
why do you get painful eye movements in ON?
CN III nerve sheet also attaches to common tendinous ring also inflamed
blood supply of eye?
internal carotid opthalmic artery
venous drainage of eye?
superior opthalmic vein cavernous sinus
what CNs pass through SOF?
CN IV, III, VI
what passes through the optic canal?
optic nerve opthalmic artery
what passes through the inferior orbital fissure?
opthalmic vein
what bones join together at the orbital rim?
maxilla zygoma frontal bone
what happens in a blowout #?
herniation of the orbital contents through one of its wals
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