Lin Hung-Yuan, Chen Hsin-Yang, Fam Han Bor, Chuang Ya-Jung, Yeoh Ronald, Lin Pi-Jung
Universal Eye Center, Zhongli Branch, Zhongli County, TaoYuan City, Taiwan, Republic of China.
Ophthalmology Department, Ningbo First Hospital, Ningbo, Zhejiang Province, People's Republic of China.
Clin Ophthalmol. 2017 Jul 12;11:1291-1299. doi: 10.2147/OPTH.S137878. eCollection 2017.
To assess the corneal keratometric values obtained using the VERION image-guided surgery system and other devices.
This study evaluated the right eyes of 115 cataract patients before intraocular lens (IOL) implantation through consecutive tests using 5 devices: VERION Reference Unit, Placido-based corneal topography (OPD-Scan III), monochromatic light-emitting diodes (LenStar LS900 and AL-Scan), and rotary prism technology (auto kerato-refractometer KR-8800). Analyzed parameters were corneal steep and flat keratometric values (Ks and Kf) and corneal astigmatism and axis. These parameters were evaluated using the one-sample two-tailed -test and the 95% limits of agreement (95% LOAs) between the devices.
The mean corneal cylinder value measurements were -0.97±0.63 D, -0.88±0.60 D, -0.90±0.69 D, -0.90±0.67 D, and -0.83±0.60 D with VERION, LenStar, AL-Scan (2.4 mm), OPD III, and KR-8800, respectively. Only KR-8800 showed a significant difference from VERION in the corneal cylinder value (<0.05). The mean differences in the Kf and Ks of VERION compared to those of OPD III were 0.18±0.45 D and 0.17±0.38 D (<0.05), respectively. The 95% LOAs of Bland-Altman analysis for the corneal astigmatism axis of the VERION with LenStar, AL-Scan (2.4 mm), OPD III, and KR-8800 were -26.25° to 58.71°, -20.61° to 47.44°, -25.03° to 58.98°, and -27.85° to 65.17°, respectively.
None of the VERION parameters were significantly different from those of AL-Scan and LenStar. AL-Scan (2.4 mm zone) was especially similar to VERION. Wide LOAs are potential contributors to axis error in patients with toric IOL implants.
评估使用VERION图像引导手术系统及其他设备获得的角膜曲率计测量值。
本研究通过使用5种设备对115例白内障患者的右眼在人工晶状体（IOL）植入术前进行连续检测：VERION参考单元、基于普拉西多盘的角膜地形图仪（OPD-Scan III）、单色发光二极管（LenStar LS900和AL-Scan）以及旋转棱镜技术（自动角膜屈光仪KR-8800）。分析的参数为角膜陡峭和扁平曲率计测量值（Ks和Kf）以及角膜散光和轴位。使用单样本双侧t检验以及各设备之间的95%一致性界限（95% LOAs）对这些参数进行评估。
使用VERION、LenStar、AL-Scan（2.4 mm）、OPD III和KR-8800测量的角膜柱镜值的平均值分别为-0.97±0.63 D、-0.88±0.60 D、-0.90±0.69 D、-0.90±0.67 D和-0.83±0.60 D。只有KR-8800在角膜柱镜值方面与VERION存在显著差异（<0.05）。与OPD III相比，VERION的Kf和Ks的平均差异分别为0.18±0.45 D和0.17±0.38 D（<0.05）。VERION与LenStar、AL-Scan（2.4 mm）、OPD III和KR-8800的角膜散光轴位的Bland-Altman分析的95% LOAs分别为-26.25°至58.71°、-20.61°至47.44°、-25.03°至58.98°和-27.85°至65.17°。
VERION的各项参数与AL-Scan和LenStar的参数均无显著差异。AL-Scan（2.4 mm区域）与VERION尤为相似。较宽的LOAs可能是导致植入散光型IOL患者轴位误差的原因。
