Comparison and Repeatability of Anterior Segment Parameters Obtained by Galilei and Slit-lamp Optical Coherence Tomography

Won Hyuk Lee, Young Hoon Hwang, Se Jong Kim, Sang Mok Lee, Chungkwon Yoo, Yong Yeon Kim, Joo Hwa Lee
2011 Journal of the Korean Ophthalmological Society  
인제대학교 의과대학 상계백병원 안과학교실 1 , 국군수도병원 안과 2 , 고려대학교 의과대학 안과학교실 3 목적: Galilei dual-Scheimpflug analyzer와 slit-lamp optical coherence tomography (SL-OCT)로 측정한 전방깊이와 중심각막두께 의 반복성과 차이에 대해서 알아보고자 하였다. 대상과 방법: 젊은 정상인 68명의 68안을 대상으로 Galilei와 SL-OCT로 전방깊이와 중심각막두께를 동일한 검사자가 3회 측정하여 검사자내 반복성을 평가하고 두 기계간의 측정값을 비교하였다. 결과: 두 검사기구로 측정한 전방깊이와 중심각막두께는 모두 높은 반복성을 보였으며(급내상관계수≥0.994), Galilei로 측정한 전방깊 이는 SL-OCT로 측정한 값보다 평균 0.11 ± 0.09 mm, 중심각막두께는 평균 14.01 ± 7.38 μm 더 높은 소견을 보였다(p<0.001). 두 검사기구의 전방깊이와 중심각막두께의 95% 일치도
more » ... 위는 각각 0.36 mm, 27.66 μm이었으며 높은 상관관계를 보였다(상관계수≥ 0.89, p<0.001). Purpose: To evaluate the repeatability and comparability of anterior chamber depth (ACD) and central corneal thickness (CCT) measurements obtained by Galilei dual Scheimpflug analyzer (Ziemer, Port, Switzerland) and slit-lamp optical coherence tomography (SL-OCT; Heidelberg Engineering, Dossenheim, Germany). Methods: ACD and CCT were measured by Galilei and SL-OCT in 68 eyes of 68 healthy young subjects. Each measurement was performed 3 times by a single examiner, and the repeatability of 3 consecutive measurements was analyzed. ACD and CCT measurements were compared between the 2 devices. Results: Both Galilei and SL-OCT showed high repeatability (ICCs ≥ 0.994) for ACD and CCT measurements. The mean ACD and CCT measured by Galilei were greater than SL-OCT measurements by 0.11 ± 0.09 mm and 14.01 ± 7.38 μm, respectively. The 95% limit of agreement values for ACD and CCT measurements were 0.36 mm, 27.66 μm, respectively, and were highly correlated (correlation coefficients ≥ 0.89, p < 0.001). Conclusions: Although the repeatability of each device was high, ACD and CCT obtained by Galilei and SL-OCT were significantly different. These differences should be considered when interpreting ACD and CCT measurements obtained by the 2 devices.
doi:10.3341/jkos.2011.52.1.53 fatcat:fpxzqev6o5ah3estqwuuoerine