When inspecting a patient's eyes, the nurse assesses the presence of cranial nerve III (oculomotor nerve) by observing the eyelids open and close bilaterally.
What other technique does a nurse use to test the function of this cranial nerve?
Visual acuity.
Peripheral vision.
Presence of the red reflex.
Pupillary constriction to light.
The Correct Answer is D
Choice A rationale
Visual acuity tests assess the clarity of vision and the ability to discern letters or numbers at a set distance. It is used to test the function of cranial nerve II (optic nerve) rather than cranial nerve III (oculomotor nerve). Testing visual acuity involves using eye charts and assessing each eye separately.
Choice B rationale
Peripheral vision tests evaluate the ability to see objects outside the direct line of vision and are used to test the function of cranial nerve II (optic nerve). Peripheral vision assessment helps in diagnosing conditions like glaucoma but does not test the function of cranial nerve III.
Choice C rationale
The presence of the red reflex is assessed by looking into the eye with an ophthalmoscope to check for abnormalities in the eye's posterior segment. It is not related to the function of cranial nerve III but rather indicates healthy eye structures, including the retina and optic nerve (cranial nerve II).
Choice D rationale
Pupillary constriction to light is a direct test of cranial nerve III function. The oculomotor nerve controls the constriction of the pupil in response to light. By shining a light into the eyes and observing the pupils' response, the nurse can assess the integrity of cranial nerve III.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
The abducens cranial nerve (CN VI) controls the lateral rectus muscle of the eye, which is responsible for outward movement. It is not assessed using the Snellen visual acuity chart. The function of this nerve is tested through the evaluation of lateral eye movements.
Choice B rationale
The optic cranial nerve (CN II) is responsible for vision, including visual acuity and visual fields. It is assessed using the Snellen visual acuity chart to determine how well a person can see at various distances. This test evaluates the clarity and sharpness of vision, making CN II the correct answer.
Choice C rationale
The trochlear cranial nerve (CN IV) controls the superior oblique muscle, which helps with downward and inward eye movements. It is not assessed using the Snellen visual acuity chart but rather through the evaluation of eye movements and alignment.
Choice D rationale
The oculomotor cranial nerve (CN III) controls most of the eye's movements, including those of the superior, inferior, and medial rectus muscles, as well as the inferior oblique muscle. It is also responsible for controlling the pupil's response to light. The Snellen visual acuity chart does not assess the function of CN III, as it focuses on visual clarity and acuity.
Correct Answer is C
Explanation
Choice A rationale
Rhonchi are low-pitched, coarse sounds typically heard during expiration, associated with secretions in large airways, not high-pitched continuous sounds.
Choice B rationale
Stridor is a high-pitched sound heard during inspiration, typically indicating upper airway obstruction.
Choice C rationale
Wheezes are continuous high-pitched whistling sounds heard during expiration, common in conditions like chronic obstructive pulmonary disease, where airway narrowing is present.
Choice D rationale
Crackles are discontinuous sounds heard during inspiration, usually associated with fluid in the lungs or alveolar opening, not continuous high-pitched sounds. .
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.