정상안과 펨토초레이저 라식수술안에서 서로 다른 4가지 각막두께 측정계들의 중심각막두께 비교
Central Corneal Thickness Measured by Four Different Methods in Normal and Post-Femtosecond Laser-Assisted LASIK Eyes
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목적: 정상안과 펨토초레이저 라식수술안에서 4가지 각막두께 측정계를 통해 중심각막두께를 비교하고자 한다. 대상과 방법: 정상 30안(그룹 I), 펨토초레이저 라식수술 후 6개월 이내 30안(그룹 II), 6개월 이상 경과한 30안(그룹 III)을 대상으로Orbscan, Pentacam, Galilei, 초음파 각막두께측정계의 순서로 중심각막두께를 측정하였다. 결과: 그룹 I에서 측정계간의 두께는 통계적 차이를 보이지 않았고(P =.202, one way ANOVA) 그룹 II와 III에서는 각각 측정계간의통계적인 차이가 있었다(P =.000 and P =.000, respectively, one way ANOVA). 그룹 II, III에서 Orbscan의 중심각막두께의 평균값이Pentacam, Galilei, 초음파 각막두께측정계보다 통계적으로 유의하게 얇게 측정되었다(P＜0.05, one way ANOVA). 결론: 4가지 측정계 모두 정상안에서 술 전 각막두께를 재기에 적합하나 펨토초레이저 라식수술 안에서는 Orbscan이 다른 측정계에비해 얇게 측정되는 경향을 보이므로 술 전후 진단에 적절한 기계를 선별하여 사용하는 것이 필요하다.
Abstract
Purpose: To compare corneal pachymetry assessment using four measurement methods in normal and post-femtosecond laserassisted LASIK eyes. Methods: Central corneal thickness was measured sequentially using Orbscan II, Pentacam, Galilei and ultrasonic pachymetry in 30 normal, non-surgical eyes (Group I), 30 eyes one to six months after femtosecond laser-assisted LASIK (Group II), and 30 eyes six months or longer after femtosecond laser-assisted LASIK (Group III). Results: In Group I, corneal thickness measurements were similar for all four methods (P=0.202, one way ANOVA). In Groups II and III, corneal thickness measurements were significantly different (P=0.000, respectively, one way ANOVA). Compared to the Pentacam, Galilei and ultrasonic pachymetry, Orbscan significantly underestimated the corneal thicknesses in Groups II and III (P＜0.005, respectively, one way ANOVA). Conclusions: Central corneal thicknesses of normal eyes were similar for all four measurements, therefore corneal thickness measurements before refractive surgery using all four measurements is suitable. However measurements obtained with the Orbscan II were thinner than those obtained with the Pentacam, Galilei or ultrasonic pachymetry in post femtosecond laserassisted LASIK eyes. Further studies are needed to determine which instrument is more accurate in measuring central corneal thickness before and after refractive surgery.
참고문헌 (21)
- Binder PS, "Ectasia after laser in situ keratomileusis", J Cataract Refract Surg, 29, pp.2419~2429 (2003)
- Price FW Jr, "Central corneal pachymetry in patients undergoing laser in situ keratomileusis", Ophthalmology, 106, pp.2216~2220 (1999)
- Iskander NG, "Postoperative complications in laser in situ keratomileusis", Curr Opin Ophthalmol, 11, pp.273~279 (2000)
- Miglior S, "Intraobserver and interobserver reproducibility in the evaluation of ultrasonic pachymetry measurements of central corneal thickness", Br J Ophthalmol, 88, pp.174~177 (2004)
- Solomon OD, "Corneal indentation during ultrasonic pachometry", Cornea, 18, pp.214~215 (1999)
- Rufer F, "Central and peripheral corneal pachymetry--standard evaluation with the Pentacam system", Klin Monatsbl Augenheilkd, 222, pp.117~122 (2005)
- Menassa N, "Comparison and reproducibility of corneal thickness and curvature readings obtained by the Galilei and the Orbscan II analysis systems", J Cataract Refract Surg, 34, pp.1742~1747 (2008)
- Kang PS, "Comparison of corneal thickness measurements with the orbscan and ultrasonic pachymetry", J Korean Ophthalmol Soc, 41, pp.1697~703 (2000)
- 김성현, "라식 수술 전후에 Orbscan Topography System과 Ultrasonic pachymetry의 각막두께측정의 정확성", 대한안과학회지, 43(12), pp.22~2518 (2002), 대한안과학회
- 권민재, "엑시머 레이저를 이용한 각막 굴절교정수술 후 Orbscan을 이용한 각막두께 측정", 대한안과학회지, 45(6), pp.5~5 (2004), 대한안과학회
- 신영주, "두 가지 각막지형도 검사에서의 각막 측정값 비교", 대한안과학회지, 48(5), pp.637~641 (2007), 대한안과학회
- Ho T, "Central corneal thickness measurements using Orbscan II, Visante, ultrasound, and Pentacam pachymetry after laser in situ keratomileusis for myopia", J Cataract Refract Surg, 33, pp.1177~1182 (2007)
- Hashemi H, "Central corneal thickness measurement with Pentacam, Orbscan II, and ultrasound devices before and after laser refractive surgery for myopia", J Cataract Refract Surg, 33, pp.1701~1707 (2007)
- Kim SW, "Central corneal thickness measurements in unoperated eyes and eyes after PRK for myopia using Pentacam, Orbscan II, and ultrasonic pachymetry", J Refract Surg, 23, pp.888~894 (2007)
- Cheng AC, "Pachymetry assessment with Orbscan II in postoperative patients with myopic LASIK", J Refract Surg, 22, pp.363~366 (2006)
- Prisant O, "Reliability of pachymetric measurements using Orbscan after excimer refractive surgery", Ophthalmology, 110, pp.511~515 (2003)
- Yaylali V, "Corneal thickness measurements with the Orbscan Topography System and ultrasonic pachymetry", J Cataract Refract Surg, 23, pp.1345~1350 (1997)
- Giessler S, "Orbscan pachymetry after LASIK is not reliable", J Refract Surg, 17, pp.385~387 (2001)
- Boscia F, "Accuracy of Orbscan optical pachymetry in corneas with haze", J Cataract Refract Surg, 28, pp.253~258 (2002)
- Fakhry MA, "Comparison of corneal pachymetry using ultrasound and Orbscan II", J Cataract Refract Surg, 28, pp.248~252 (2002)
- von Jagow B, "Corneal architecture of femtosecond laser and microkeratome flaps imaged by anterior segment optical coherence tomography", J Cataract Refract Surg, 35, pp.35~41 (2009)