When measuring distance visual acuity, the medical assistant should instruct the patient to do which of the following?
Stand 25 feet from the Snellen chart.
Allow them to squint if necessary.
Keep both eyes open while using the occluder.
Start with the bottom line of the Snellen chart and work upward.
The Correct Answer is C
A. Stand 25 feet from the Snellen chart. The standard distance for testing visual acuity with a Snellen chart is 20 feet, not 25 feet. Testing at 25 feet would not provide accurate results.
B. Allow them to squint if necessary. Squinting can artificially improve vision, leading to inaccurate results. The patient should be instructed to avoid squinting during the test.
C. Keep both eyes open while using the occluder. The patient should use the occluder to cover one eye but keep both eyes open during the test. This ensures that each eye is tested individually without any pressure or distortion from closing the other eye.
D. Start with the bottom line of the Snellen chart and work upward. The patient should start from the top of the Snellen chart and work downward. Starting from the bottom would likely result in frustration and inaccurate assessment as the lines become increasingly difficult.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Wipe away the first five drops of blood after puncturing: Only the first drop of blood should be wiped away to remove any tissue fluid, not the first five drops.
B. Apply even pressure to the finger during the collection: Applying even pressure helps to promote blood flow without causing hemolysis or excessive squeezing, which could affect test results.
C. Puncture the index finger at the tip: The recommended site for a capillary puncture is the side of the middle or ring finger, not the tip of the index finger.
D. Puncture parallel to the fingerprint: The puncture should be made perpendicular to the fingerprint ridges to ensure an adequate blood flow and reduce the risk of blood running along the ridges.
Correct Answer is B
Explanation
A. Subcutaneous: Subcutaneous injections are administered beneath the skin but are not considered topical.
B. Transdermal: Transdermal medications are applied directly to the skin and are absorbed through it, which is a form of topical administration.
C. Intramuscular: Intramuscular injections are given into the muscle tissue, not applied topically.
D. Percutaneous: Percutaneous administration involves drugs absorbed through the skin or mucous membranes, but the term is less specific compared to "transdermal" for topical medications.
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