The nurse is reviewing a client's medical record with a documented Snellen exam of 20/50, uncorrected.
Patient could read the Rosenbaum chart without difficulty.
Based on this information, the client has:
Myopia.
Normal vision.
Presbyopia.
Hyperopia.
The Correct Answer is D
Choice A rationale
Myopia, or nearsightedness, is when distant objects appear blurry because light rays focus in front of the retina. A Snellen exam result of 20/50 means the client can see at 20 feet what someone with normal vision sees at 50 feet, indicating reduced distance vision. However, this condition does not correlate with the ability to read the Rosenbaum chart, which is for near vision, thus excluding myopia.
Choice B rationale
Normal vision is not indicated by a Snellen exam result of 20/50, as this signifies a visual impairment where the client sees at 20 feet what a person with normal vision sees at 50 feet. Normal vision would be indicated by 20/20 on the Snellen exam.
Choice C rationale
Presbyopia is the age-related loss of the eye's ability to focus on near objects, typically noticeable in people over 40. Although this condition involves difficulty reading at close range, the client's uncorrected Snellen exam result of 20/50 pertains to distance vision, which differentiates presbyopia from the given scenario.
Choice D rationale
Hyperopia, or farsightedness, is when close objects appear blurry because light rays focus behind the retina. The client's ability to read the Rosenbaum chart without difficulty indicates good near vision, while the Snellen exam result of 20/50 reflects reduced distance vision, thus supporting the diagnosis of hyperopia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Atrial depolarization refers to the electrical activation of the atria, which is depicted by the P wave on an ECG, not the T wave. The P wave represents the contraction phase of the atria as it pumps blood into the ventricles. Therefore, this option is incorrect for the T wave.
Choice B rationale
Atrial repolarization is the process of the atria returning to their resting state. This repolarization is generally obscured by the QRS complex on an ECG and is not associated with the T wave. Thus, this answer choice is also incorrect.
Choice C rationale
Ventricular depolarization is represented by the QRS complex on an ECG. It indicates the ventricles are contracting to pump blood to the lungs and the rest of the body. Therefore, it does not correlate with the T wave.
Choice D rationale
Ventricular repolarization is indicated by the T wave on an ECG. This phase signifies the ventricles returning to their resting state after the contraction. It is the correct answer as it accurately reflects the T wave's function.
Correct Answer is A
Explanation
Choice A rationale
Flatness is the percussion sound typically heard over muscles and solid tissues. It is characterized by a high-pitched, soft sound, which indicates that the underlying tissue is denser and less air-filled compared to lungs.
Choice B rationale
Dullness is heard over solid organs such as the liver or spleen but not typically over muscles.
Choice C rationale
Tympany is a drum-like sound heard over areas filled with gas, such as the stomach or intestines.
Choice D rationale
Resonance is heard over air-filled lungs and not over muscles and solid tissues.
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