Warden Laurence, Liu Yueai, Binder Perry S, Dreher Andreas W, Sverdrup Lawrence
Ophthonix Inc, 1491 Poinsetta Ave, Vista, CA 92081, USA.
J Refract Surg. 2008 Feb;24(2):188-96. doi: 10.3928/1081597X-20080201-10.
To compare the performance of the Ophthonix Z-View diffractive aberrometer with two different Hartmann-Shack aberrometers.
The Ophthonix Z-View was compared with the Alcon LADARWave and VISX WaveScan using 4 model eyes and 68 human eyes. Comparisons using three fixed, single-surface model eyes each with a different wavefront pattern were used to determine higher order accuracy. Lower order accuracy, linearity, and higher order repeatability were tested with a fourth model eye with a movable retinal surface. Manifest refraction spherical equivalent and the calculated spherical equivalent refraction of the aberrometers were compared in 68 human eyes.
The Z-View was more accurate with lower noise compared to the WaveScan and LADARWave systems for higher order measurements of the fixed model eyes. Total root-mean-square difference from surface topography derived average values for all model eye configurations were 0.48, 0.95, and 0.74 microm for the Z-View, WaveScan, and LADARWave aberrometers, respectively. Average inter-measurement standard deviations for the fixed model eyes were 0.024, 0.025, and 0.034 microm for the Z-View, WaveScan, and LADARWave aberrometers, respectively. Results were similar among the systems for measuring the movable retina surface model eye and comparing manifest refraction spherical equivalent of the patients.
Data gathered using one variable and several fixed-parameter model eyes showed good correlation to predicted values for all of the aberrrometers with one exception. A significant difference was found in the measurement of one individual fixed model eye with one of the three aberrometers. The wavefront refraction provided by the Z-View correlated well with the results of manifest refraction.
比较Ophthonix Z-View衍射像差仪与两种不同的Hartmann-Shack像差仪的性能。
使用4个模型眼和68只人眼将Ophthonix Z-View与Alcon LADARWave和VISX WaveScan进行比较。使用三个固定的单表面模型眼，每个模型眼具有不同的波前模式进行比较，以确定高阶精度。使用具有可移动视网膜表面的第四个模型眼测试低阶精度、线性度和高阶重复性。在68只人眼中比较了显验光球镜等效度和像差仪计算的球镜等效度。
对于固定模型眼的高阶测量，与WaveScan和LADARWave系统相比，Z-View更准确且噪声更低。对于所有模型眼配置，Z-View、WaveScan和LADARWave像差仪与表面地形测量得出的平均值的总均方根差分别为0.48、0.95和0.74微米。固定模型眼的平均测量间标准差，Z-View、WaveScan和LADARWave像差仪分别为0.024、0.025和0.034微米。在测量可移动视网膜表面模型眼以及比较患者的显验光球镜等效度方面，各系统的结果相似。
使用一个变量和几个固定参数模型眼收集的数据表明，除一个例外，所有像差仪的测量结果与预测值具有良好的相关性。在使用三种像差仪之一测量一个单独的固定模型眼时发现了显著差异。Z-View提供的波前屈光与显验光结果相关性良好。
