자동굴절검사기의 신뢰성 평가 및 Fourier analysis에 의한 정확도 분석 = Repeatability Assessment of Autorefractor and Accuracy Analysis of Refraction Measurements by Fourier

다국어 초록 (Multilingual Abstract)

Purpose: We have evaluated both the reliability and accuracy of refractive measurement from autorefractor by comparing with subjective refraction data. Methods: Measurements of refractive error were performed on 198 eyes of 99 subjects in noncycloplegic condition. Also we analyzed refraction results and evaluated repeatability and accuracy of subjective refraction and autorefraction. Furthermore we analyzed accuracy of autorefractor by Fourier analysis. Results: Reliability coefficient of the autorefraction for the right eye were determined to by 0.993, 0.974 and 0.925 respectively, in the spherical, cylinderical component and cylinderical Axis. Also, the reliability coefficient of the autorefraction for the left eye were found to be 0.991, 0.948 and 0.886, respectively, in the spherical, cylinderical component and cylinderical Axis. From the Fourier analysis no statistically significant differences in J0 component were found between the auto and subjective refraction measurements (p>0.05) whereas difference of refractive power of J45 component when compared with the subjective refraction were -0.019, -0.164. Conclusions: We conclude that autorefractormeter can be effectively used to measure the refractive power within the error limits.

국문 초록 (Abstract)

목적: 본 연구는 자동굴절검사기를 사용하여 측정한 값을 자각적굴절검사 값과 비교하여 그 정확도와 신뢰성을 분석하고자 하였다. 방법: 99명 198안을 대상으로 조절마비제를 투여하지 않고 굴절검사를 실시하였으며, 자각적굴 절검사와 자동굴절검사기로 측정된 각각의 굴절력을 분석하여 신뢰도와 정확도를 평가하였다. 또한 Fourier analysis 를 사용하여 자동굴절검사기의 정확도를 분석하였다. 결과: 자동굴절검사기의 신뢰도 계수는 우안의 경우 구면굴절 력에서 0.993, 난시굴절력은 0.974, 난시축은 0.925로 나타났으며, 좌안은 구면굴절력의 신뢰도 계수가 0.991, 난시 굴절력은 0.948, 난시축은 0.886으로 나타났다. Fourier analysis에 의해 자각적굴절검사와 비교하여 J0 component에 서 통계적으로 유의미한 차이가 없었으며(p>0.05), 자각적굴절검사와 비교하여 J45 component의 굴절력 차이 값은 -0.019와 -0.164로 나타났다. 결론: 본 연구에서 사용된 자동굴절검사기는 큰 오차 값을 가지지 않고 굴절력을 측 정하는데 유용하게 사용될 수 있을 것으로 판단된다.

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