http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최시환,이연희,김진하,Si-Hwan Choi,Yeon-Hee Lee,Jin-Ha Kim 대한안과학회 2005 대한안과학회지 Vol.46 No.3
Purpose: To evaluate the efficacy of two excimer laser systems with eye-tracker in the term of decentration amount. Methods: We performed LASIK with LaserScan LSXTM (group 1, 39 eyes) and Allegretto WaveTM (group 2, 94 eyes), both of which were equipped with eye-tracker. The amount of decentration was measured on a difference map that was obtained from preoperative and postoperative corneal topography, and was compared between the two groups. Results: The amount of decentration was significantly higher in group 1 (0.39±0.22 mm) than in group 2 (0.29±0.18 mm) (p=0.018). When these groups were subdivided by preoperative spherical equivalent, in case of under -6.0 D, the amount of decentration between the two groups (0.31±0.16 mm in group 1, 0.28±0.15 mm in group 2, p=0.380), whereas in case of over -6.0 D, the amount of decentration was significantly higher in group 1 (0.48±0.26 mm) than in group 2 (0.30±0.21 mm) (p=0.020). Conclusions: Allegretto WaveTM showed better centration ability than LaserScan LSXTM and this superiority was more profound in highly myopic eyes.
레이저 각막두께측정계 각막형태검사와 초음파를 이용한 각막두께측정비교
최시환,김정훈,한남수,조영준,이성복,Si Hwan Choi,Jeong Hoon Kim,Nam Su Han,Young Joon Jo,Seong Bok Lee 대한안과학회 2006 대한안과학회지 Vol.47 No.1
Purpose: To investigate the accuracy and reproducibility of Optical Low Coherence Reflectometry (OLCR) corneal thickness measurements compared with the Orbscan system and ultrasound pachymeter (IOPac, Mentor). Methods: Two examiners measured corneal thicknesses of 78 normal eyes and in 36 eyes that had undergone LASIK, and five sequential measurements of corneal thickness with OLCR, Orbscan system, Mentor, and IOPac were performed. Remeasurements of corneal thickness in 24 normal eyes were performed after two days to investigate intra-examiner reproducibility. Results: The average corneal thickness measured in normal subjects was 536.3±23.8 ?m in OLCR, 542.4±25.3 ?m in the Orbscan system, 535.4±23.7 ?m in Mentor, and 534.2±24.1 ?m in IOPac. The average corneal thickness measured in patients who had undergone LASIK was 487.3±30.8 ?m in OLCR, 492.5±36.5 ?m in the Orbscan system, 487.5±30.8 ?m in Mentor, and 485.3±30.8 ?m in IOPac. There was no statistically significant difference between the four pachymeters. The inter-examiner and intra-examiner reproducibilities were shown to be highly reliable. Conclusions: The OLCR showed similar measurments of corneal thickness with the Orbscan system and ultrasound pachymeter, and showed no difference in reproducibility with different examiners.
최시환,이연희,윤여민,이재림,Si-Hwan Choi,M,D,Yeon-Hee Lee,M,D,Yie-Min Yun,M,D,Jae-Lim Lee,M,D 대한안과학회 2005 대한안과학회지 Vol.46 No.2
Purpose: To provide fundamental data for screening for prior refractive surgery in donor cornea. Methods: The corneal curvature map and pachymetric measurements were analyzed in 68 eyes that had undergone corneal refractive surgery. Differences in the corneal curvature of the center and periphery, differences in the corneal thickness of the center and periphery, and the shape factor on the curvature map in postoperative eyes were compared with preoperative measurements. Results: Measurement of the central corneal curvature subtracted from the peripheral corneal curvature was -1.64±0.71D in the preoperative eyes and 3.10±1.68D in the postoperative eyes. With a criterion of -0.23D, the sensitivity and specificity were 100% and 98.5%, respectively. The shape factor was 0.24±0.09 in the preoperative eyes and -0.82±0.45 in the postoperative eyes. With a criterion of 0.058, the sensitivity and specificity were both 100%. Measurement of the central corneal thickness subtracted from the peripheral corneal thickness was 97.60±25.42 ?m in the preoperative eyes and 163.47±38.5 ?m in the postoperative eyes. With a criterion of 123.0 ?m, the sensitivity and specificity were 89.7% and 88.4%, respectively. Conclusions: Regional differences in corneal curvature and shape factor may be very useful parameters in screening for prior refractive surgery in donor cornea. The difference in corneal thickness may also be a useful parameter.