【摘要】：目的分析VERION數(shù)字導(dǎo)航系統(tǒng)測(cè)量角膜曲率和散光的可重復(fù)性及其與iTrace、Lenstar LS900、手動(dòng)角膜曲率計(jì)檢測(cè)結(jié)果的一致性。方法對(duì)62名年齡相關(guān)性白內(nèi)障患者分別用上述四種儀器進(jìn)行角膜生物測(cè)量,記錄并分析陡峭軸角膜曲率(steep keratometry,Ks)、平坦軸角膜曲率(flat keratometry,Kf)、散光幅度、散光軸位、矢量參數(shù)J0和J45。分析VERION測(cè)量的可重復(fù)性,并比較VERION與其他三種儀器測(cè)量結(jié)果的一致性。結(jié)果用組內(nèi)相關(guān)系數(shù)(intraclass correlation coefficient,ICC)和克隆巴赫系數(shù)(Cronbach’s alpha,α)分別對(duì)Ks、Kf、散光幅度、散光軸位、J0以及J45做出分析,結(jié)果均大于0.9(均為P0.001),提示VERION測(cè)量角膜曲率及散光的可重復(fù)性極好。VERION測(cè)量的Ks、散光幅度均高于iTrace(均為P0.05),其余指標(biāo)的差異無(wú)統(tǒng)計(jì)學(xué)意義(均為P0.05)。Bland-Altman分析顯示J0、J45及散光軸位的95%LOA分別為(-0.31~0.35)D、(-0.25~0.31)D、-13.5°~12.3°。二者測(cè)量的散光軸位差小于10°者占總體的77%(48/62),在合并角膜散光大于1D的患者中占91%(42/46)。VERION與Lenstar LS900測(cè)量結(jié)果僅J45差異有統(tǒng)計(jì)學(xué)意義(P0.05),其余指標(biāo)差異無(wú)統(tǒng)計(jì)學(xué)意義(均為P0.05)。Bland-Altman分析發(fā)現(xiàn)J0、J45及散光軸位的95%LOA分別為(-0.25~0.31)D、(-0.27~0.36)D、-13.5°~11.0°。二者測(cè)量的散光軸位差小于10°者占總體的85%(53/62),在合并角膜散光大于1D的患者中占93%(43/46)。VERION與手動(dòng)角膜曲率計(jì)檢測(cè)的Kf、散光幅度差異有統(tǒng)計(jì)學(xué)意義(均為P0.05),其余指標(biāo)差異無(wú)統(tǒng)計(jì)學(xué)意義(均為P0.05)。Bland-Altman分析顯示J0、J45及散光軸位的95%LOA分別為(-0.38~0.35)D、(-0.41~0.42)D、-12.6°~16.4°。二者測(cè)量的散光軸位差小于10°者占總體的81%(50/62),在合并角膜散光大于1D的患者中占91%(42/46)。結(jié)論VERION在測(cè)量角膜曲率及散光方面具有良好的可重復(fù)性。其與iTrace、Lenstar LS900和手動(dòng)角膜曲率計(jì)在角膜曲率、散光幅度的測(cè)量方面一致性較好,但對(duì)散光軸位的測(cè)量差別較大。
[Abstract]:Objective to analyze the repeatability of VERION digital navigation system in measuring corneal curvature and astigmatism and its consistency with iTrace,Lenstar LS900, manual keratometer. Methods 62 patients with age-related cataract were measured with the above four instruments. The corneal curvature (steep keratometry,Ks), flat-axis corneal curvature (flat keratometry,Kf), astigmatism amplitude, astigmatism axis, vector parameters J _ 0 and J _ 45 were recorded and analyzed. The repeatability of VERION measurement is analyzed and the consistency between VERION and other three instruments is compared. Results the astigmatism amplitude, astigmatism axis J0 and J45 of Ks,Kf, were analyzed by intra-group correlation coefficient (intraclass correlation coefficient,ICC) and Kronbach coefficient (Cronbach's alpha, 偽), respectively. The results were all greater than 0. 9 (P0. 001), indicating that the Ks, astigmatism amplitude measured by VERION was higher than that of iTrace (P0.05). The other indexes were not significantly different (P0.05). Bland-Altman analysis showed that the 95%LOA of J0 J45 and astigmatism axis were (-0.31) 0.35) D, (-0.250.31 DU -13.5 擄12.3 擄. 77% (48 / 62) of the patients with astigmatism less than 10 擄measured, 91% (42 / 46) of the patients with corneal astigmatism greater than 1D, only J45 (P0.05) compared with Lenstar LS900, but no significant difference was found in other indexes (P0.05) .Bland-Altman score. The 95%LOA of J0 / J45 and astigmatism axis is (-0.25 ~ 0.31) D, (-0.27 ~ 0.36) DU -13.5 擄~ 11.0 擄, respectively. 85% (53 / 62) of the patients with astigmatism less than 10 擄measured, 93% (43 / 46) of the patients with corneal astigmatism greater than 1D, and 93% (43 / 46) of the patients with corneal astigmatism were significantly different from the Kf, astigmatism measured by manual keratometer (P0.05). Statistical significance (P0.05). Bland-Altman analysis showed that the 95%LOA of J0 / J45 and astigmatism axis were (-0.38) 0.35) D, (-0.41 ~ 0.42) DU -12.6 擄and 16.4 擄respectively. The axial difference of astigmatism less than 10 擄accounted for 81% (50 / 62) of the total, and 91% (42 / 46) of the patients with corneal astigmatism greater than 1D. Conclusion VERION has good reproducibility in measuring corneal curvature and astigmatism. It is consistent with iTrace,Lenstar LS900 and manual keratometer in the measurement of corneal curvature and astigmatism amplitude, but the measurement of astigmatism axis is quite different.
【作者單位】： 天津醫(yī)科大學(xué)眼科臨床學(xué)院天津醫(yī)科大學(xué)眼科醫(yī)院;
【分類(lèi)號(hào)】：R770.4

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