基于点光源彩色发光二极管的角膜地形图仪、普拉西多盘角膜地形图仪以及普拉西多和双倾斜Scheimpflug组合设备所获得的角膜屈光力、散光和波前像差测量结果的比较。
Comparison of corneal power, astigmatism, and wavefront aberration measurements obtained by a point-source color light-emitting diode-based topographer, a Placido-disk topographer, and a combined Placido and dual Scheimpflug device.
作者信息
Ventura Bruna V, Wang Li, Ali Shazia F, Koch Douglas D, Weikert Mitchell P
机构信息
From the Cullen Eye Institute (Ventura, Wang, Ali, Koch, Weikert), Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA; Altino Ventura Foundation (Ventura), Recife, and the Department of Ophthalmology (Ventura), Federal University of São Paulo, São Paulo, Brazil.
From the Cullen Eye Institute (Ventura, Wang, Ali, Koch, Weikert), Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA; Altino Ventura Foundation (Ventura), Recife, and the Department of Ophthalmology (Ventura), Federal University of São Paulo, São Paulo, Brazil.
出版信息
J Cataract Refract Surg. 2015 Aug;41(8):1658-71. doi: 10.1016/j.jcrs.2014.11.051.
PURPOSE
To evaluate and compare the performance of a point-source color light-emitting diode (LED)-based topographer (color-LED) in measuring anterior corneal power and aberrations with that of a Placido-disk topographer and a combined Placido and dual Scheimpflug device.
SETTING
Cullen Eye Institute, Baylor College of Medicine, Houston, Texas USA.
DESIGN
Retrospective observational case series.
METHODS
Normal eyes and post-refractive-surgery eyes were consecutively measured using color-LED, Placido, and dual-Scheimpflug devices. The main outcome measures were anterior corneal power, astigmatism, and higher-order aberrations (HOAs) (6.0 mm pupil), which were compared using the t test.
RESULTS
There were no statistically significant differences in corneal power measurements in normal and post-refractive surgery eyes and in astigmatism magnitude in post-refractive surgery eyes between the color-LED device and Placido or dual Scheimpflug devices (all P > .05). In normal eyes, there were no statistically significant differences in 3rd-order coma and 4th-order spherical aberration between the color-LED and Placido devices and in HOA root mean square, 3rd-order coma, 3rd-order trefoil, 4th-order spherical aberration, and 4th-order secondary astigmatism between the color-LED and dual Scheimpflug devices (all P > .05). In post-refractive surgery eyes, the color-LED device agreed with the Placido and dual-Scheimpflug devices regarding 3rd-order coma and 4th-order spherical aberration (all P > .05).
CONCLUSIONS
In normal and post-refractive surgery eyes, all 3 devices were comparable with respect to corneal power. The agreement in corneal aberrations varied.
FINANCIAL DISCLOSURE
Drs. Wang, Koch, and Weikert are consultants to Ziemer Ophthalmic Systems AG. Dr. Koch is a consultant to Abbott Medical Optics, Inc., Alcon Surgical, Inc., and i-Optics Corp.
目的
评估并比较基于点光源彩色发光二极管（LED）的角膜地形图仪（彩色LED）与普拉西多盘角膜地形图仪以及普拉西多和双施密特盘联合设备在测量角膜前表面屈光力和像差方面的性能。
地点
美国得克萨斯州休斯顿贝勒医学院卡伦眼科研究所。
设计
回顾性观察病例系列。
方法
使用彩色LED、普拉西多和双施密特盘设备对正常眼和屈光手术后眼进行连续测量。主要观察指标为角膜前表面屈光力、散光和高阶像差（6.0mm瞳孔），使用t检验进行比较。
结果
在正常眼和屈光手术后眼中，彩色LED设备与普拉西多或双施密特盘设备在角膜屈光力测量方面以及在屈光手术后眼中的散光量方面均无统计学显著差异（所有P>.05）。在正常眼中，彩色LED与普拉西多设备在三阶彗差和四阶球差方面以及彩色LED与双施密特盘设备在高阶像差均方根、三阶彗差、三阶三叶形像差、四阶球差和四阶继发性散光方面均无统计学显著差异（所有P>.05）。在屈光手术后眼中，彩色LED设备在三阶彗差和四阶球差方面与普拉西多和双施密特盘设备一致（所有P>.05）。
结论
在正常眼和屈光手术后眼中，所有三种设备在角膜屈光力方面具有可比性。角膜像差的一致性有所不同。
财务披露
王医生、科赫医生和魏克特医生是齐默眼科系统股份公司的顾问。科赫医生是雅培医疗光学公司、爱尔康手术公司和i-Optics公司的顾问。
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