【摘要】 目的探讨Sirius与A超对不同程度近视患者中央角膜厚度(CCT)的测量差异。方法对225例(450眼)拟行角膜屈光手术的近视患者,按低、中、高度近视分三组,依次用Sirius和A超测量CCT。测量结果行配对t检验、Pearson相关及Bland-Altman分析。结果低、中、高度近视组中,Sirius所测CCT均数分别为(542.61±29.19)μm、(543.96±27.02)μm、(547.25±22.53)μm;A超CCT均数分别为(538.51±29.12)μm、(540.98±26.56)μm、(542.19±21.64)μm。不同近视组中,Sirius测量值均略大于A超值,且两者高度正相关,差异有统计学意义(P<0.05)。Bland-Altman分析,不同近视组中,两种仪器测量CCT的一致性较好。结论 Sirius在绝大多数情况下能够替代传统的A超角膜测厚仪,但对拟行激光手术的高度近视患者应该综合考虑两种仪器测量结果。更多还原

【Abstract】 Objective To study the measurement differences of central corneal thickness( CCT) in different degree of myopia by Sirius and ultrasound pachymetry( UP). Methods 225 myopic subjects( 450 eyes) were recruited and divided into three groups according to the degree of refractive errors. The CCT were obtained from the eyes for each subjects using the Sirius and UP. Data were compared by using paired t-tests and the Pearson correlations. Bland-Altman analysis of all pairs were determined. Results The mean CCT in low myopic group obtained from Sirius and UP were( 542. 61 ± 29. 19) μm and( 538. 51 ± 29. 12) μm,respectively. The mean CCT in medium myopic group by Sirius and UP were( 543. 96 ± 27. 02) μm and( 540. 98 ± 26. 56) μm. The measured mean CCT in high myopic group were( 547. 25 ± 22. 53) μm and( 542. 19 ±21. 64) μm by Sirius and UP. The mean CCT measurements between the two instruments were high correlated and statistically different( P < 0. 05) in the three groups respectively. In different myopia groups Sirius has good coincidence with UP in measuring CCT according to the Bland-Altman plot. Conclusion In vast majority of cases,Sirius can replace traditional UP in measuring CCT. But for the preopreative examination of the high myopia patients,we need to think twice about the difference between the two measurements.更多还原