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50 Cards in this Set
- Front
- Back
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Whichever muscle's primary action is depression of the eyeball? a. Superior b. Lateral c. Inferior d. Medial |
c. Inferior |
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Tears spilling onto the cheek is called _________ a. Epinephrine b. Epiphoria c. Episcleritis d. Epitropa |
b. Epiphoria |
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Which of the rectus muscles is innervated by cranial nerve VI? a. Superior b. Lateral c. Inferior d. Medial |
b. Lateral |
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In the visual pathway, if la lesson occurs at the chiasm, the resultant visual field defects are usually _______ a. Unilateral b. Central c. Arcuate d. Bilateral |
d. Bilateral |
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The blood supply to the eye comes through which one of the following? a. Ophthalmic artery b. Ophthalmic vein c. Ophthalmic aorta d. Ophthalmic vena cava |
a. Ophthalmic artery |
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The innervation of the cornea is mainly sensory branches of such nerve? a. Cranial nerve IV b. Cranial nerve III c. Cranial nerve VI d. Cranial nerve V |
d. Cranial nerve V (trigeminal) |
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The vascular tunic, or uvea, consists (from front to back) of __________ a. Choroids, ciliary body, and iris b. Iris, ciliary body, and Choroid c. Ciliary body, iris, choroid d. Iris, chroids, and ciliary body |
b. Iris, ciliary body, and choroid |
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Which structure is the second most powerful retracting component of the eye? a. Aqueous b. Cornea c. Lens d. Vitreous |
c. Lens |
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The _______ is the area of the retina that is responsible for fine discriminations and high visual acuity a. Fovea b. Optic nerve c. Periphery d. Epithelium |
a. Fovea |
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Function of the ciliary body |
Produce aqueous humor and accommodation |
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Function of the glands of Zeiss |
Produce oil to protect eye lashes from drying out and becoming brittle |
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The palpebral fissure which is the space between the eyelids normally measures? a. 5mm d. 10mm c. 15mm d. 20mm |
d. 10mm |
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What are the 6 extra ocular muscles? |
a. Medial rectus b. Inferior rectus c. Lateral rectus d. Superior rectus e. Superior oblique f. Inferior oblique |
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An internal hordeolum is caused by a blockage of the ______ and ________ glands a. Punctal and lacrimal b. Canaliculi and punctal c. Meibomiam and tarsal |
c. Meibomian and tarsal |
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Type of drug used to paralyze accommodation is? a. Sphincter b. Dilator c. Cycloplegic |
c. Cycloplegic |
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What type of visual field defect will be presenti if damage to optic chiasm occurs? a. Bilateral Hemianopsia b. Orbicularis oculi |
a. Bitemporal hemianopsia |
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The _____ ______ is the muscle responsible for eyelids closure? a. Orbicularis oculi b. Ptosis c. Muller muscle |
a. Orbicularis oculi |
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The eyelid turns outward due to loss of elasticity of our tissues a. Presbyopia b. Entropian c. Ectropian |
c. Ectropian |
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What is the muscle responsible for eyelid retraction |
Levator palpebrae superior |
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Function of the Cystaline lens |
Allows focus on near objects (accommodation) |
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How many layers in the retina? |
10 layers |
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Structures responsible for tear flow |
Puncta canaliculi, lacrimal sac, nasolacrimal duct |
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Fluids that help maintain the shape of the eye |
Aqueous and vitreous humor |
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What is the chiasm? |
The X shaped structure formed at the point below the brain where the two optic nerves cross each other |
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Where is the Choroid located? |
Between the sclera and the retina |
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What is the sclera? |
The white layer of the eyeball. At the front of the eye it is continuous with the cornea |
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What are the 5 layers of the cornea? |
a. Bowman's membrane b. Stroma c. Descemet's membrane d. Endothelium e. Epithelium |
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Which rectus muscle is the strongest and is responsible for adduction of the eye? a. Superior b. Lateral c. Inferior d. Medial |
d. Medial |
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Extorsion is described as rotating the top of the eyeball _______ and the bottom _______ a. In, out b. Up, out c. Down, in d. Out, in |
d. Out, in |
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When a meibomian gland becomes blocked and a red, painful bump appears on the lid, it is called _________ a. A chalazion b. A pellet c. A nodule d. A hordeolum |
d. A hordeolum |
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Which extraocular muscles are involved when the patient's gaze is far left and up? a. Left lateral rectus and right medial rectus b. Left superior rectus and right inferior oblique c. Right superior oblique and left inferior rectus d. Right inferior rectus and left superior oblique |
b. Left superior rectus and right inferior oblique |
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The floor of the orbit is composed of which three bones? a. Sphenoid, lacrimal, and palatine b. Ethmoid, sphenoid, and lacrimal c. Maxilla, frontal, and ethmoid d. Maxilla, zygomztic, and palatine |
d. Maxilla, zigomatic, and palatine |
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The tertiary action of the superior oblique is _______ a. Elevation b. Extorsion c. Intorsion d. Depression |
c. Intorsion |
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What area of the retina is responsible for discrimination and high visual acuity? |
Fovea |
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The condition in which the eyes are so tightly closed they cannot be opened is called _________ a. Chalazion b. Ptosis c. Conjunctivitis d. Blepharospasm |
d. Blepharospasm |
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Loss of focusing ability that relates to the process of aging is called? |
Presbyopia |
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Cloudiness of the clear lens of the eye is known as |
Cataracts |
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Part of the retina that is used when reading an eye chart is? |
Macula |
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Function of the cornea is ? |
Focus and retract light |
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Name the three layers of tear film |
Oil (lipid) layer, water (aqueos) layer and mucin layer |
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The _______ muscle causes the pupil to constrict in bright light |
Sphincter |
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Pooling of blood between the conjunctiva and episcleara is called? |
Subconjunctival hemorrhage |
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The cornea receives oxygen and nutrients from? |
Conjunctival blood vessels and fluid in front of and behind it |
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The muscle responsible for opening the pupil in dark conditions is? |
Dilator |
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Produce the watery layer of the tear film in conjunction with the lacrimal gland |
Glands of kraise and wolfring |
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Sweat glands found in the lid margin |
Glands of moll |
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Reflex blinking is? |
Rapid forceful closure of the eyelids that protects the eye from foreign bodies and excessive light |
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Produce mucus to aid in the stability of tear film |
Glover cells |
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Three conditions that could cause corneal neovascularization |
a. Edema b. Inflammation c. Inadequate tear film oxygen content |
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Which structure is the second most powerful retracting component of the eye? |
Lens |
