Fu Yana, Yu Xinxin, Savini Giacomo, Huang Jinhai, Lian Hengli, Song Benhao, Wang Qinmei, Zhao Yune
a School of Ophthalmology and Eye Hospital , Wenzhou Medical University , Wenzhou , China.
b G.B. Bietti Foundation IRCCS , Rome , Italy.
Curr Eye Res. 2018 Oct;43(10):1205-1214. doi: 10.1080/02713683.2018.1488264. Epub 2018 Jul 19.
To compare keratometry and corneal astigmatism measurements obtained by the Verion Image Guided System to those obtained by automated keratometry (IOLMaster), manual keratometry (YZ38, Suzhou 66 visual Polytron Technologies Inc., China), and Scheimpflug imaging (Pentacam HR) in eyes with cataract.
A total of 149 cataractous eyes of 149 patients were examined and categorized as low astigmatism (<1.0 D, N = 50), moderate astigmatism (1.0-2.0 D, N = 49), and high astigmatism (>2.0 D, N = 50). The flattest and the steepest keratometric values (Kf and Ks), the magnitude of astigmatism (Ast), the orientation of the steepest meridian (Axis), and power vectors J and J were compared.
Keratometry readings (Kf, Ks, and Km) obtained by the Verion system showed statistically significant differences as compared to the other three devices. The magnitude of astigmatism (Ast) measured by the Verion (1.50 ± 0.85 D) was similar to that measured by the YZ38 (1.45 ± 0.82 D, P = 0.110) and slightly lower than that by the IOLMaster (1.56 ± 0.87 D, P = 0.014), but much higher than that by the Pentacam (1.36 ± 0.81 D, P = 0.000) significantly. However, no statistically significant differences were observed in the J and J vectors in the whole sample, besides moderate and high astigmatism subgroups. A difference in astigmatism magnitude of 0.50 D or more was detected between the Verion system and other three devices most commonly in moderate astigmatism eyes (16.3-24.5%). The difference in the location of the steep meridian was greater than 10 degrees most frequently in the low astigmatism eyes (26.0-52.0%).
Keratometric and astigmatic results obtained with Verion were not completely interchangeable with those obtained with IOLMaster, manual keratometry, and Pentacam. The individual differences in power and orientation of the corneal cylinder should be considered while selecting the appropriate toric intraocular lens.
比较Verion图像引导系统所测得的角膜曲率和角膜散光测量值与自动角膜曲率计（IOLMaster）、手动角膜曲率计（YZ38，苏州六六视觉科技股份有限公司，中国）以及在白内障眼中的Scheimpflug成像（Pentacam HR）所测得的结果。
对149例患者的149只白内障眼进行检查，并分为低散光（<1.0 D，N = 50）、中度散光（1.0 - 2.0 D，N = 49）和高度散光（>2.0 D，N = 50）。比较最平坦和最陡峭的角膜曲率值（Kf和Ks）、散光量（Ast）、最陡峭子午线的方向（Axis）以及屈光力矢量J0和J45。
与其他三种设备相比，Verion系统所获得的角膜曲率读数（Kf、Ks和Km）显示出统计学上的显著差异。Verion测得的散光量（Ast）（1.50±0.85 D）与YZ38测得的（1.45±0.82 D，P = 0.110）相似，略低于IOLMaster测得的（1.56±0.87 D，P = 0.014），但显著高于Pentacam测得的（1.36±0.81 D，P = 0.000）。然而，除了中度和高度散光亚组外，在整个样本的J0和J45矢量中未观察到统计学上的显著差异。在中度散光眼中（16.3 - 24.5%），Verion系统与其他三种设备之间最常检测到散光量差异为0.50 D或更大。在低散光眼中（26.0 - 52.0%），最陡峭子午线位置的差异最常大于10度。
Verion所获得的角膜曲率和散光结果与IOLMaster、手动角膜曲率计和Pentacam所获得的结果不能完全互换。在选择合适的有晶状体眼人工晶状体时，应考虑角膜柱镜的屈光力和方向的个体差异。
