Lambda-X s.a., Rue de l'industrie 37, Nivelles, Belgium.
Cont Lens Anterior Eye. 2010 Feb;33(1):3-8. doi: 10.1016/j.clae.2009.11.001. Epub 2009 Dec 21.
To assess a new method of power measurement of soft and rigid contact lenses. The method is the phase shifting schlieren method, as embodied in the Nimo TR1504 instrument.
Three Nimo TR1504 instruments were used to measure the power related dimensions of: (a) a range of custom toric rigid lenses; (b) a range of commercially available spherical hydrogel lenses; and (c) a commercially available range of toric silicone hydrogel lenses. The measurements were carried out using a standard ISO ring test protocol where independent tests were carried out under conditions of reproducibility. The analysis of the measurements was carried out using ISO methods which enabled the reproducibility standard deviation, SR, of the method to be calculated.
The results show that this new method has SR of 0.048D for spherical soft (hydrogel) lenses. This means the back vertex power of spherical soft lenses having a power in the range +/-10.0D can be determined to current ISO product tolerances with a single measurement. The method has SR of 0.059D for sphere power and 0.093D for cylinder power for toric soft lenses having powers in the range +/-10.0D and cylinder powers in the range +/-2.0D. A single measurement will determine sphere power to current ISO tolerance limits with 95% confidence while two measurements are required to determine the cylinder power to the same confidence level.
评估一种新的软镜和硬镜配适力测量方法。该方法是相移阴影法，体现在 Nimo TR1504 仪器中。
使用三台 Nimo TR1504 仪器测量了以下内容的相关尺寸：(a) 一系列定制的有角硬性隐形眼镜；(b) 一系列市售的球面水凝胶隐形眼镜；(c) 一系列市售的有角硅水凝胶隐形眼镜。测量使用标准 ISO 环测试协议进行，在可重复性条件下进行独立测试。使用 ISO 方法分析测量结果，可计算出方法的重复性标准偏差（SR）。
结果表明，这种新方法对球面软性（水凝胶）隐形眼镜的 SR 为 0.048D。这意味着 +/-10.0D 球镜隐形眼镜的后顶点屈光度可以通过单次测量来确定符合当前 ISO 产品公差。对于 +/-10.0D 球镜和 +/-2.0D 柱镜的有角软性隐形眼镜，该方法的球镜 SR 为 0.059D，柱镜 SR 为 0.093D。95%置信度时，单次测量即可确定球镜屈光度符合当前 ISO 公差限制，而两次测量则需要达到相同的置信水平来确定柱镜屈光度。
