Practice Quiz - Eye
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  1. You are testing the extraocular muscles and their innervation in a patient who periodically experiences double vision. When you ask him to turn his right eye inward toward his nose and look downward he is able to look inward, but not down. Which nerve is most likely involved?
    Abducens
    Nasociliary
    Oculomotor, inferior division
    Oculomotor, superior division
    Trochlear
  2. The outermost layer of the optic nerve sheath is a continuation of the:
    Arachnoid membrane
    Meningeal dura
    Periosteal dura
    Pia mater
    Retina
  3. The inner lining of the eyelid is called the:
    Orbital septum
    Palpebral conjunctiva
    Periorbita
    Sclera
    Tarsal plate
  4. What would the examining physician notice in the eye of a person who has taken a sympathetic blocking agent?
    Exophthalmos and dilated iris
    Enophthalmos and dry eye
    Dry eye and inability to accommodate for reading
    Wide open eyelids and loss of depth perception
    Ptosis and miosis (pin-point pupil)
  5. You are examining a patient who has a pituitary tumor involving the cavernous sinus. While doing a preliminary eye exam, you suspect the right abducens nerve of the patient has been damaged by the tumor. In which direction would you have the patient turn his right eye to confirm the defect?
    Inward
    Outward
    Downward
    Down and out
    Down and in
    Upward
    Up and out
    Up and in
  6. You have a patient with a drooping right eyelid. You suspect Horner's syndrome. Which of the following signs on the right side would confirm this diagnosis?
    Constricted pupil
    Dry eye (lack of tears)
    Exophthalmos
    Pale, blanched face
    Sweaty face
  7. Following endarterectomy on the right common carotid, a patient is found to be blind in the right eye. It appears that a small thrombus embolized during surgery and lodged in the artery supplying the optic nerve. What artery would be blocked?
    Central artery of the retina
    Infraorbital
    Lacrimal
    Nasociliary
    Supraorbital
  8. You are asked to check the integrity of the trochlear nerve in the right eye of a patient. Starting with the eyes directed straight ahead, you would have the patient look:
    Inward, toward the nose and downward
    Inward, toward the nose and upward
    Toward the nose in a horizontal plane
    Laterally in a horizontal plane
    Outward, away from the nose and downward
    Outward, away from the nose and upward
  9. The ducts of the lacrimal gland open into the:
    Superior fornix of the conjunctiva
    Inferior fornix of the conjunctiva
    Lacrimal puncta
    Lacrimal canaliculi
    Lacrimal lake
  10. Starting from a position gazing straight ahead, to direct the gaze downward, the inferior rectus muscle must be active along with the:
    Superior oblique
    Inferior oblique
    Medial rectus
    Lateral rectus
    Superior rectus
  11. During a physical examination it is noted that a patient has ptosis. What muscle must be paralyzed?
    Orbicularis oculi, lacrimal part
    Orbicularis oculi, palpebral part
    Stapedius
    Superior oblique
    Superior tarsal (smooth muscle portion of levator palpebrae)
  12. The extraocular muscle that does not originate at or near the apex of the orbit is the :
    Inferior oblique
    Inferior rectus
    Levator palpebrae superioris
    Superior oblique
    Superior rectus
  13. An adolescent boy suffers from severe acne. As is often the case he frequently squeezed the pimples on his face. He subsequently develops a fever and deteriorates into a confused mental state and drowsiness. He is taken to his physician and after several tests a diagnosis of cavernous sinus infection and thrombosis is made. The route of entry to the cavernous sinus from the face was most likely the:
    Carotid artery
    Mastoid emissary vein
    Middle meningeal artery
    Ophthalmic vein
    Parietal emissary vein
  14. If a person looking inward towards their nose is unable to look down, which nerve may be injured?
    Abducens (CN VI)
    Inferior division of oculomotor (III)
    Optic (II)
    Superior division of oculomotor (III)
    Trochlear (IV)
  15. If a person is taking a sympathetic blocking agent, what would you notice in her or his eyes?
    Dry eyes and inability to accommodate for reading
    Enophthalmos and teary eyes (III)
    Exophthalmos and dilated pupil
    Ptosis and constricted pupil
    Wide open eyes and loss of depth perception (IV)