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48 Cards in this Set
- Front
- Back
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what are the bones of the orbit
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frontal
sphenoid ethmoid lacrimal maxillary palatine zygomatic |
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what part of the orbit bone is the thinnest of them all
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ethmoid
-erosion may occur in children affected in sinuses |
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what forms the bulk of the orbit floor
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maxillary bone
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what gives the cheek structure
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zygomatic
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what are the functions of the eyelid
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protect eye from injury and too much light plus spread lacrimal fluid to keep cornea moist
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what are the movable folds of the eye lid composed of
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thin skin externally
mucous membrane internally tarsal plate muscles (orbicularis oculi, levator palpebrae superioris) eyelashes |
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what is another name for eyelashes
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cilia
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what is palebral conjuntiva
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mucous membrane internally
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what is the job of the bulbar conjunctiva
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reflects back on the eyeball keeping contacts from being stuck in the back of the eye ball
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what stregnthens the eyelid
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tarsal plate
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what cranial never innervates the orbicularis oculi
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CN 7
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contract closes the eyelid
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orbicularis oculi
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contract raised the superior eyelid
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levator palperbrae superioris
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what cranial nerve innervates the levator palpebrae superioris
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CN 3
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what is CN 3 called
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occulomotor nerve
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what cranial nerve can be seen
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CN 2
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what is the name of CN 2
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optic nerve
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what cranial nerves supply the extraocular muscles
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CN 3, 4, 6
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what is the lacrimal gland stimulated by
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parasympathetic impulses from CN 7
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what allows light to pass through the retina
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pupil
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what is the colored portion of the eye
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iris
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what is the clear epithelial tissue covering the lens, iris, and pupil
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cornea
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what is the white of the eye
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sclera
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what are the 3 layers of the eyeball
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fibrous
vascular (uvea) inner |
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what are the parts of the fibrous layer of the eyeball
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cornea
sclera |
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what provides the eyeball with its shape
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sclera
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what provides anchorage to extrinsic (extraocular) and intrinsic muscles
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sclera
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what controls the amount of light passing to the retina
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iris
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what are the muscle of the iris
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sphincter pupillae - PSNS, contraction = contracts pupil
dilator pupilla - SNS, contraction = dilates pupil |
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what produces aqueous humor
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ciliary body
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what changes the shape of the lens to allow accommodation of vision
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ciliary body
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what is responsible for the red reflex and contains most the blood vessels
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choroid
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what are the parts of the vascular (uvea) layer of the eyeball
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iris
ciliary body choroid |
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what are the 2 functional parts of the retina
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optic part
non visual retina |
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what portion of the eyeball is seen with an ophthalmoscope
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fundus
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what are the major parts of the Fundus
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optic disc
macula lutea fovea centralis - highest [] of cone Rc central arteries central veins |
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what is the difference b/t the central arteries and central veins
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central arteries
-bright red, narrow, narrow light reflex central veins -darker red part of the , wider than artery, wider light reflex |
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what part of the fundus is specialized for acute vision
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macula lutea
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what part of the fundus is responsible for the blind spot and why
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optic disc
b/c contains no photoreceptors |
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what chamber of the eye has the canal of schlemm and trabecular meshwork
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anterior chamber
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what are the extraocular eye muscles
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lateral rectus
medial rectus superior rectus inferior rectus superior obilique inferior obilique |
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what eye muscle ABDUCT
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lateral rectus
inferior obilique superior obilique |
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what eye muscle ADDUCT
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medial rectus
superior rectus inferior rectus |
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what eye muscles are innervated by CN3
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medial rectus
superior rectus inferior rectus inferior oblique |
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what CN innervates the lateral rectus
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CN 6 - lone rangers 6 shooter
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what CN innervates the superior oblique
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CN 4
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what is medial movement of the superior pole of the eye
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intorsion
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what is lateral movement of the superior pole of the eye
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extorsion
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