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Developments in contact lens measurement:a comparative study of industry standard geometric inspection and optical coherence tomography

机译：隐形眼镜测量的发展：行业标准几何检测和光学相干断层扫描技术的比较研究

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Purpose: The aim of this study was to compare a developmental optical coherence tomography (OCT) based contact lens inspection instrument to a widely used geometric inspection instrument (Optimec JCF), to establish the capability of a market focused OCT system. Methods: Measurements of 27 soft spherical contact lenses were made using the Optimec JCF and a new OCT based instrument, the Optimec is830. Twelve of the lenses analysed were specially commissioned from a traditional hydrogel (Contamac GM Advance 49%) and 12 from a silicone hydrogel (Contamac Definitive 65), each set with a range of back optic zone radius (BOZR) and centre thickness (CT) values. Three commercial lenses were also measured; CooperVision MyDay (Stenfilcon A) in −10D, −3D and +6D powers. Two measurements of BOZR, CT and total diameter were made for each lens in temperature controlled saline on both instruments. Results: The results showed that the is830 and JCF measurements were comparable, but that the is830 had a better repeatability coefficient for BOZR (0.065 mm compared to 0.151 mm) and CT (0.008 mm compared to 0.027 mm). Both instruments had similar results for total diameter (0.041 mm compared to 0.044 mm). Conclusions: The OCT based instrument assessed in this study is able to match and improve on the JCF instrument for the measurement of total diameter, back optic zone radius and centre thickness for soft contact lenses in temperature controlled saline.
机译：目的：本研究的目的是将基于发展的光学相干断层扫描（OCT）的隐形眼镜检查仪与广泛使用的几何检查仪（Optimec JCF）进行比较，以建立以市场为中心的OCT系统的功能。方法：使用Optimec JCF和新的基于OCT的仪器Optimec is830测量了27个软球面隐形眼镜。所分析的十二个镜片是由传统水凝胶（Contamac GM Advance 49％）特别调试的，而十二个则由硅酮水凝胶（Contamac Definitive 65）调试的，每个镜片都具有一定范围的后视镜半径（BOZR）和中心厚度（CT）价值观。还测量了三个商业镜头； CooperVision MyDay（Stenfilcon A），具有-10D，-3D和+ 6D功率。在两种仪器上在温度受控的盐水中对每个镜片进行两次BOZR，CT和总直径的测量。结果：结果表明，is830和JCF的测量值是可比较的，但is830对于BOZR（0.065毫米，相比于0.151毫米）和CT（0.008毫米，而与0.027毫米）具有更好的重复性系数。两种仪器的总直径（0.041毫米对比0.044毫米）的结果相似。结论：在这项研究中评估的基于OCT的仪器能够与JCF仪器相匹配并得到改进，该仪器可用于测量在温控盐水中的软性隐形眼镜的总直径，后视区半径和中心厚度。

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