Anatomy - Orbit, eye and nose Flashcards
(26 cards)
what two bones contribute to the superior wall of the orbit?
frontal
sphenoid
floor of the orbit is formed by?
maxilla, palatine and zygomatic
medial wall of the bony orbit if formed by?
ethmoid, maxilla, palatine and zygomatic
lateral wall of the orbit is formed by?
zygomatic and greater wing of the sphenoid
what is enophthalmos?
retraction of the eyeball - disease, dehydration or starvation
what comprises the inner layer of the eyeball?
neural layer - formed by the retina
what comprises the outer layer of the eyeball?
fibrous layer - sclera and cornea
the vascular layer of the eyeball is comprised of what?
choroid, ciliary body and iris
what structure produces aqueous humor?
ciliary epithelium
where would you find aqueous humor?
anterior and posterior chambers of the eyeball
which part of the retina is insensitive to light?
optic disc
which part of the retina has the highest visual acuity?
fovea
what causes glaucoma?
increased intraocular pressure
what structures within the eye are responsible for the refraction of light?
cornea
lens
vitreous
aqueous humours
which extraocular muscles does CNIII innervate?
inferior rectus
inferior obliques
medial rectus and superior rectus
the trochlear nerve (CNIV) innervates which EOM?
superior oblique
the abducens nerve (CNVI) innervates which EOM?
lateral rectus
what movements are achieved by the superior oblique?
depression
abduction
medial rotation
what movements are achieved by the inferior oblique?
elevation
abduction
lateral rotation
what movements are achieved by the superior rectus?
elevation
adduction
medial rotation
what movements are achieved by the inferior rectus?
depression
adduction
lateral rotation
what movements are achieved by the medial rectus?
adduction
what movements are achieved by the lateral rectus?
abduction
from which vessel does the ophthalmic artery arise?
internal carotid
