Anatomy of the eye Flashcards
which nerves are attached to the brainstem
3-12
which nerve come into the orbit from the crainial cavity?
optic nerve-, occulomotor , abducen , trochlear
3,4,6
what is the major arteries in the orbit? What is this artery a branch of?
opthalmic artery (branch of internal carotid)
what 2 things come thorught the optic canal to enter the orbital cavity?
cn2 (optic nerve), opthalimic artery
which cranial nerves control the movement of the eyeball
3,4,6
what kind of nerve is the opthalmic division of the trigeminal nerve
sensory nerve
which muscle do you use to close your eye?
orbitalis occuli
which nerve is responsible for moving the muscles of the face
facial nerve
which 2 nerves are involved in the blink reflex
v1, 7
which nerves go though the superior orbital fissure
3,4,6,v1
What is the formula to remember the muscles of the eye
LR6SO4AO3
if there is a problem with occulomotor nerve what is it always associaed with with what kind of symtoms
autonomic symptoms
if the occulomotor nerve is damaged what will the position of the eyeball be
down and out
someones eye is in the down and out position, and dilated pupil what nerve has been damaged
occulomotor nerve aka cn 3
someones eye is stuck medially what nerve is damaged
abducens cn6
a person has double vision when looking down, such as reading or going down the stairs. what nerve has been damaged
the 4th crainial nerve aka trochlear
a person must tilt thier head in order to not have double vision, which nerve has been damaged?
4th crainial nerve
what is the name of the 3rd crainial nerve
occulomotor
what nerve helps you look laterally
abducens - 6
what is the danger area of the face, and why is it called this
nose and upper lip
where is the cavernous sinus
behind the optic chiasm . An infection in this region can go thru the cavernous sinus and enter the brain . This goes thru the superior opthalmic vein
a person has an infection that traveled from his cavernous sinus to the brain . how did it get there
superior opthalmic vein
what is the direct route of cavernous sinus infection
superior opthalmic vein
superior opthalmic vein goes thru which fissure
superior orbital?
the opthalmic artery is blocked, what will occur
you will go blind
what is the function of the lacrimal gland
to lubricate the eye
what innervates the lacrimal gland
facial nerve
which nerve is responsible for the secretion of tears
facial nerve
the greater petrosal
al nerve is a branch of what
facial nerve
which specific branch of the facial nerve innervates the lacrimal gland
greater petrosal nerve
what are the 3 layers of the eyeball
outer fiberous
vascular middle
inner layer
the anterior part of the outer fiberous layer of the eye is called
cornea
the posterior part of the outer fiberous layer of the eye is called
sclera
both the anterior and posterior chambers of the eye are located where
infront of the lens
how do the anterior and posteror chambers of the eye communicate
pupil
list the path of light going through the eye
cornea aqueus humor lens vitrous humor retina
is the cornea vascularized
no, it is avascular!!
what is located in the cornal limbus
canal of schlem
the sclera corneal junction is called …
the canal of schlem
what 3 things make up the middle layer of the eye
choroid, ciliary body, iris
the thickend portion of the vascular coat between teh choroid and the iris is called
cilliary body
what kind of muscle is the cirillary muscle
smooth muscle , it controls the convexity of the lens
what is the most important function of the cilliary process
it secretes aqeous humor
what kind of fibers innervate the ciliary body
parasympathetic
are the muscles used to dialate the iris somatic or autonomic
autonomic
dialator pupilae is done by..
sympathetic
constrictor pupillae is done by ..
parasympathetic
what divides the anterior from the posterior chamber of the eye
iris
what produces aquous humor
cilliary body epithelium
aqueous humor is produced in which chamber
posterior . From the posterior chamber it goes to the anterior chamber thru the pupil .
where is aqeous humor absorbed
in the canal of schlem
incrased intracraininal pressure leads to what
optic cupping
optic cupping is a feature of what
raised intraoccular pressure
how do you tell the difference between raised intraoccular pressure and raised intracrainial pressure
intraoccular = optic disk cupping
intracrainal = papilledema
how many layers in the retina
10
the optic nerve leaves the eyeball where
optic disk
where is the blindspot in the eye
optic disk
what are the 3 branches of opthalmic division of the trigeminal
frontal
nasal
lacrimal
thru which crainial nerve does parasympathetic come thru the orbit
cn 3
a person has a tumor on their lung and is diagnosed with horner syndrome , what does thier pupil look like
constricted
occulomotor of the edingerwesphal nucleus
cillary pupillae and constrictor pupillae are innervated by
which 2 nerves innervate the eye
optic+occulomotor
when you shine a light in the eye, which nerve sense the light . Also pupillary constriciton should occur which nerve is respnosible for that
cn2 - optic
cn-3 oculomotor
a person has a light shined in their eye, and there is no constriction of thier pupil. Which nerve is messed up
CN-3 = oculomotor
what happens in the argyll robertson pupil.
There is medial convergence of the eye, but the pupil will not react .
seen in syphallis and dm
prostitues pupil
