두 가지 장비를 이용한 각막곡률 및 각막고위수차의 비교
Comparison of Keratometry and Corneal Higher Order Aberrations between Scout Videokeratoscope and Pentacam Scheimpflug Camera
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목적: Keratron Scout videokeratoscope와 Pentacam Scheimpflug Camera의 각막곡률과 각막 고위수차를 비교하고 상관관계를 알아보고자 하였다. 대상과 방법: 2012년 12월부터 2013년 2월까지 건강한 성인 23명(46안)을 대상으로 Keratron Scout videokeratoscope와 PentacamHR Scheimpflug Camera를 이용하여 각막곡률과 각막고위수차를 측정하고 비교하였다. 결과: Keratron Scout와 Pentacam HR을 사용하여 측정한 각막곡률은 95% confidence interval -0.155 ± 0.37로 높은 수준의 상관관계를 보였다. Keratron Scout와 Pentacam HR 간에 각막 총 고위수차의 상관 분석에서 총 Root-mean-square (RMS) 및 구면수차는 통계학적으로 유의한 상관관계를 나타내었다(r=0.67, p＜0.001, r=0.74, p＜0.001). Keratron Scout의 각막 고위수차와Pentacam HR의 각막전면고위수차의 상관 분석에서는 총 RMS, 구면수차 및 코마 수차에서 통계학적으로 유의한 상관관계를 나타내었다(r=0.62, p＜0.001, r=0.81, p＜0.001, r=0.52, p=0.047). 결론: 다른 원리를 사용하는 Keratron Scout와 Pentacam HR의 두 기기의 각막곡률값과 임상적으로 중요한 총 RMS, 구면수차 및코마수차에서 유의한 상관관계를 나타내어서 두 장비 모두 임상적으로 유용하게 사용될 수 있다.
Abstract
Purpose: To investigate the correlations of keratometry and corneal high order aberrations (HOAs) between the Keratron Scoutvideokeratoscope and the Pentacam HR Scheimpflug camera. Methods: From December 2012 to February 2013, keratometry and corneal HOAs were determined using the Keratron Scoutvideokeratoscope and Pentacam HR Scheimpflug camera in 23 healthy individuals (46 eyes). Results: Average keratometry showed high correlation with 95% confidence interval -0.155 ± 0.37 between the Keratron Scoutand Pentacam HR. When comparing HOAs of the Keratron Scout and total corneal HOAs of Pentacam HR, total root-meansquare(RMS), and spherical aberration were positively correlated between the 2 devices (r = 0.67, p < 0.001 and r = 0.74, p <0.001, respectively). When comparing HOAs of Keratron Scout and anterior corneal HOAs of Pentacam HR, total RMS, sphericalaberration and coma were positively correlated between the 2 devices (r = 0.62, p < 0.001, r = 0.81, p < 0.001, and r = 0.52,p = 0.047, respectively). Conclusions: Although the 2 devices are based upon different principles, the Keratron Scout videokeratoscope and PentacamHR Scheimpflug camera showed positive correlations in keratometry, total RMS, spherical aberration, and coma. Both devicesmay be useful for clinical applications.
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