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인트라라식 후 빛간섭단층촬영계로 측정한 각막절편 두께의 재현성 평가
김희중,오세훈,이도형,이종현,이강일,김진형,Hee Jung Kim,Sae Hoon Oh,Do Hyung Lee,Jong Hyun Lee,Kang Il Rhee,Jin Hyoung Kim 대한안과학회 2007 대한안과학회지 Vol.48 No.12
Purpose: To investigate the relationship among optical coherence tomography (OCT), ultrasound pachymetry, and Orbscan in central corneal thickness measurement and to evaluate the reproducibility of flap thickness using an IntraLase femtosecond laser. Methods: Central corneal thickness was measured by OCT, ultrasound pachymetry, and Orbscan in 59 eyes of 30 patients before LASIK. After IntraLASIK, the corneal flap thickness measured using OCT was compared with the intended corneal flap thickness. Results: Central corneal thickness measured by OCT was thinner than that measured by other instruments preoperatively, but there was no significant difference among these methods (p>0.01), and corneal thickness values obtained by ultrasound pachymetry and Orbscan correlated well with those obtained by OCT (r ranged from 0.804 to 0.889, p<0.01). After IntraLASIK, there was no significant difference between the mean measured flap thickness and the intended flap thickness (p>0.01). Conclusions: OCT is a relatively accurate instrument for measuring corneal thickness and can easily measure the corneal flap thickness after LASIK. Compared with the results of a previous study, the mean measured flap thickness in this study was more reproducible with the IntraLase femtosecond laser.