A patient's vision is recorded as 20/30 when the Snellen eye chart is used. The nurse interprets these results to indicate that:

The patient can read at 20 feet what a person with normal vision can read at 30 feet.

The patient can read from 30 feet what a person with normal vision can read from 20 feet.

At 30 feet the patient can read the entire chart.

The patient can read the chart from 20 feet in the left eye and 30-feet in the right eye.

Answer and Explanation

The Correct Answer is A

A. A vision of 20/30 means that the patient can read at 20 feet what a person with normal vision can read at 30 feet, indicating mild visual impairment.

B. This reverses the explanation of 20/30 vision and is incorrect.

C. This option incorrectly describes the Snellen chart results, which measure clarity of vision at specific distances, not entire chart reading ability.

D. This option confuses visual acuity for each eye; Snellen scores do not indicate different distances for each eye.

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Correct Answer is B

Explanation

A. Capillary refill time greater than 2 seconds is abnormal and requires further assessment.

B. A capillary refill time of 5 seconds indicates delayed peripheral perfusion and warrants further investigation.

C. While frostbite can cause delayed refill, it is less likely than vascular insufficiency in this scenario.

D. Delayed capillary refill is more often associated with arterial, not venous, insufficiency.

A. Pupillary dilation when looking at a far object B. Pupillary constriction when looking at a near object C. Changes in peripheral vision in response to light D. Involuntary blinking in the presence of bright light

Correct Answer is B

Explanation

A. Pupillary dilation when looking at a far object: While dilation occurs with distance, the question specifically refers to near vision.

B. Pupillary constriction when looking at a near object: Accommodation is the process by which the eyes adjust to focus on near objects, which includes pupillary constriction and lens thickening.

C. Changes in peripheral vision: This describes visual field testing, not accommodation.

D. Involuntary blinking in bright light: This describes the corneal reflex, not accommodation.

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A patient's vision is recorded as 20/30 when the Snellen eye chart is used. The nurse interprets these results to indicate that:

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Naxlex Comprehensive Predictor Exams

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Explanation

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Correct Answer is B

Explanation

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