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목적 : To compare and analyze central corneal thickness(CCT) measurements according to the corneal thickness obtained with noncontact specular microscopy(NCSM) and ultrasound pachymetry(USP).
방법 : CCT was measured in order of NCSM and USP by a single optometrist in 120 eyes of 120 healthy subjects. The measurements were compared between the devices. The measurement agreements and correlation between the devices were analyzed. In order to determine if the measurements differ depending on the thickness of cornea, the patients were divided into three tertile groups from the thinnest patient by CCT measurements using USP, and then the difference of the CCT measured by the two devices was analyzed.
결과 : The CCT measurements using NCSM and USP were measured 548.25±4.64 μm and 533.09±35.96 μm respectively, NCSM was measured thicker, showing statistically significant differences between the measurements(p<0.001). The two exams showed high degree of correlation (r=0.878, p<0.01). In the three groups, the difference of CCT measurements between NCSM and USP was 12.93±21.88 μm, 16.85 ±15.89 μm, and 15.70 ±20.46 μm, respectively, and the difference between the three groups was not statistically significant(p=0.655).
결론 : The result of this study show that although the difference of CCT measurements using NCSM and USP are consistent regardless of corneal thickness, the CCT measurements by NCSM and USP are highly correlated.
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