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Answer :
Final answer:
The patient has slight nearsightedness based on their spectacle rx. Their uncorrected distance acuity is expected to be 20/40.
Explanation:
The patient's spectacle rx is -0.50-2.00x090. In this prescription, the first number (-0.50) represents the spherical power, the second number (-2.00) represents the cylindrical power, and the last number (090) represents the axis. For uncorrected distance acuity, we focus on the spherical power. A spherical power of -0.50 indicates that the patient has a slight degree of nearsightedness. Based on this prescription, we can expect their uncorrected distance acuity to be between 20/40 and 20/50. Therefore, the answer is C) 20/40.
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