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KMID : 0379919970220010092
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Journal of The Korea Socity of Health Informatics and Statistics
1997 Volume.22 No. 1 p.92 ~ p.101
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Repeatability and Accuracy of Automated Refraction (Topcon KR - 7100P)
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Mahn Ki-Choong
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Abstract
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This study assessed the repeatability and accuracy of the Autorefractor(Topcon KR-7100P) in comparison to subjective refraction. Autorefraction were taken with a Test-Retest separation of at least 3 days. Repeatability and accuracy statistics and plots were generated using matrix representations of dioptric power. Coefficient of Repeatability(COR) of the autorefraction found to be 0.2713, 0.1105 and 0.3234 in the horizontal, torsional, and vertical components. Coefficient of accuracy(COA) of the autorefraction found to be 1.0632, 0.2397 and 0.2397 in the horizontal, torsional, and vertical components. Confidence regions for mean dioptric power of the Test - Retest Difference and Autorefraction - Subjective refraction difference were represented by cllipsoids in a three-dimensional space called h-space.
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