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Which of the following devices is used to estimate the nature and amount of refractive error?
Which of the following devices is used to estimate the nature and amount of refractive error?
What is the purpose of the pinhole test disc?
What is the purpose of the pinhole test disc?
Which device consists of an aperture that limits the admission of light to approximately one meridian?
Which device consists of an aperture that limits the admission of light to approximately one meridian?
What is the purpose of the stenopaic slit?
What is the purpose of the stenopaic slit?
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Which device contains two small pinholes spaced to all within the average sized pupil?
Which device contains two small pinholes spaced to all within the average sized pupil?
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Which of the following devices is useful for determining the refractive status and consists of an aperture ranging from 0.5mm to 0.75mm in width and up to 15mm in length?
Which of the following devices is useful for determining the refractive status and consists of an aperture ranging from 0.5mm to 0.75mm in width and up to 15mm in length?
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What is the purpose of the pinhole test disc?
What is the purpose of the pinhole test disc?
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Which device contains two small pinholes spaced to all within the average sized pupil?
Which device contains two small pinholes spaced to all within the average sized pupil?
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What is the purpose of the stenopaic slit?
What is the purpose of the stenopaic slit?
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Which of the following devices is used to estimate the nature and amount of refractive error?
Which of the following devices is used to estimate the nature and amount of refractive error?
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