Which cranial nerve is assessed by using the Snellen visual acuity chart?

Abducens cranial nerve (CN V).

Optic cranial nerve (CN I).

Trochlear cranial nerve (CN VI).

Oculomotor cranial nerve (CN II).

Answer and Explanation

The Correct Answer is D

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.

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Correct Answer is A

Explanation

Choice A rationale

The general survey is an overall assessment of a client's physical appearance, behavior, mobility, and neurological status. It provides a comprehensive overview of the client's health and well-being, making it the focus of the nurse's observations in this scenario.

Choice B rationale

Medical history includes past and current health conditions, surgeries, medications, and family health history. While important, it is not the focus of the nurse's immediate observations in this scenario.

Choice C rationale

Biographical data involves personal information such as age, gender, occupation, and marital status. While relevant to the client's health, it is not the primary focus of the nurse's observations in this scenario.

Choice D rationale

Social history includes information about the client's lifestyle, habits, and social environment. While valuable for understanding the client's overall health context, it is not the focus of the nurse's immediate observations in this scenario. .

A. Whisper and Romberg tests. B. PERRLA and EOMs. C. Snellen and Rosenbaum tests. D. Rinne and Weber tests.

Correct Answer is D

Explanation

Choice A rationale

The Whisper test evaluates hearing acuity, while the Romberg test assesses balance and proprioception by having the client stand with feet together and eyes closed. Both tests involve sensory assessments but do not directly assess cranial nerve VIII, which is the vestibulocochlear nerve responsible for hearing and balance.

Choice B rationale

PERRLA (pupils equal, round, reactive to light and accommodation) assesses cranial nerves II and III, while EOMs (extraocular movements) assess cranial nerves III, IV, and VI. These tests do not evaluate cranial nerve VIII.

Choice C rationale

Snellen and Rosenbaum tests measure visual acuity for distance and near vision, respectively. These tests assess cranial nerves II and III but do not evaluate cranial nerve VIII.

Choice D rationale

The Rinne and Weber tests are audiometric assessments that specifically evaluate cranial nerve VIII, which controls hearing and balance. The Rinne test compares air and bone conduction of sound, while the Weber test assesses sound lateralization, making them appropriate tests for assessing cranial nerve VIII.

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Which cranial nerve is assessed by using the Snellen visual acuity chart?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse notices the client's physical appearance, behavior, mobility, and neurological status when they enter the room.Which of the following is the nurse assessing?

Correct Answer is A

Explanation

A nurse is assessing cranial nerve VIII.What tests will be administered on the client?

Correct Answer is D

Explanation

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