A nurse document that a client has a normal pupillary light reflex. The nurse should recognize that this reflex indicates which of the following?
The eye focuses the image in the center of the pupil
Constriction both pupils occurs in response to bright light
The eye focuses the light on the sclera
Dilation of both pupils occurs in response to bright light
The Correct Answer is B
A) The eye focuses the image in the center of the pupil:
This option describes the accommodation reflex, not the pupillary light reflex. The accommodation reflex involves the focusing of the eye to bring an image to the center of the retina, but it does not relate to the constriction of the pupils in response to light. Therefore, it is not the correct answer for describing the pupillary light reflex.
B) Constriction of both pupils occurs in response to bright light:
This is the correct description of the pupillary light reflex. When light is shined into one eye, the normal response is for both pupils (direct and consensual response) to constrict. The pupillary light reflex tests the integrity of the optic nerve (cranial nerve II) and the oculomotor nerve (cranial nerve III), which control the constriction of the pupil in response to light. A normal pupillary light reflex is characterized by the constriction of both pupils when exposed to light.
C) The eye focuses the light on the sclera:
This statement is inaccurate. The sclera is the white part of the eye, and light is focused on the retina (specifically the fovea) for proper vision. This does not relate to the pupillary light reflex, which specifically refers to the constriction of the pupils in response to light.
D) Dilation of both pupils occurs in response to bright light:
This is incorrect. Dilation of the pupils occurs in low light conditions as part of the pupillary dilation reflex (also called the "dark reflex") to allow more light into the eye. However, in response to bright light, the pupils constrict, not dilate. The constriction of the pupils in bright light is the primary characteristic of a normal pupillary light reflex.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Dysphagia:
Dysphagia, or difficulty swallowing, is a common issue in clients who have had a stroke, particularly when there is facial drooping or weakness on one side of the face, which can affect the muscles involved in swallowing. A stroke can cause motor impairment, affecting the coordination and strength required for effective swallowing. This condition increases the risk of aspiration (food or liquid entering the airway), which can lead to respiratory complications such as pneumonia. It is crucial to assess for dysphagia in stroke patients and provide appropriate interventions, such as speech therapy and modified diets, to ensure safe swallowing.
B. Rhinitis:
Rhinitis, which refers to inflammation of the nasal passages causing symptoms like congestion, sneezing, and runny nose, is not directly related to stroke. Although rhinitis can be caused by allergies, infections, or environmental irritants, it is not a typical finding following a stroke. The presence of facial drooping on one side is more suggestive of a neurological issue affecting motor control, rather than an issue with the nasal passages or upper respiratory system.
C. Xerostomia:
Xerostomia, or dry mouth, can occur for various reasons, such as medication side effects or dehydration, but it is not a primary concern directly associated with stroke-induced facial drooping. While facial nerve dysfunction can affect salivation (since the facial nerve helps control the salivary glands), dysphagia and facial drooping are more immediate concerns for stroke patients. Xerostomia may occur in some cases, but it is not as directly linked to stroke as dysphagia is.
D. Epistaxis:
Epistaxis, or nosebleeds, is not a typical complication of stroke and is not associated with facial drooping. While certain factors like dry air, medications (e.g., anticoagulants), or trauma could cause nosebleeds, they are not common findings directly related to a stroke. The focus should be on potential neurological deficits, such as difficulty swallowing, impaired speech, or weakness, rather than epistaxis.
Correct Answer is D
Explanation
A) The presence of cerumen in the ear canal:
This is incorrect. The presence of cerumen (earwax) in the ear canal is not inherently abnormal. In fact, cerumen is a natural substance produced by the body to protect and clean the ear canal. While excessive buildup can lead to blockages or hearing impairment, some amount of cerumen is normal and does not indicate an abnormal finding.
B) A shiny, pearly white color tympanic membrane:
This is incorrect. A shiny, pearly white tympanic membrane is a normal finding. This color and appearance indicate a healthy, intact eardrum. The tympanic membrane should be translucent with a smooth surface and this typical pearly appearance in a healthy ear.
C) A clear presence of a cone of light:
This is incorrect. The cone of light is a normal finding during otoscopic examination. It is a reflection of the otoscope light off the tympanic membrane and should be visible in the anterior-inferior quadrant of the tympanic membrane. The presence of the cone of light suggests that the eardrum is intact and in a normal position.
D) A yellow or amber color to the tympanic membrane:
This is the correct answer. A yellow or amber color of the tympanic membrane suggests the presence of fluid behind the eardrum, which may indicate an ear infection or otitis media. This color change is considered abnormal and should prompt further investigation, as it can be a sign of inflammation, infection, or the accumulation of fluid in the middle ear.
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