Intraocular lens (IOL) is widely used for cataract treatment. Its optical properties are crucial to obtain a good treatment efficacy and thus need to be evaluated and controlled. In this study, we propose a novel method based on optical coherence tomography (OCT) for noncontact and accurate in vitro measurement of thickness, refractive index and dioptric power of IOL implants. The OCT setup is specially designed to create two sampling optics, called dual-side view OCT (DSV-OCT), which allows for imaging IOL from the two opposite sides simultaneously in single OCT volume scanning. This can produce a three-dimensional surface contour without suffering image distortions due to the refraction of the curved surface. Then, the thickness and surface curvature can be easily computed from the surface contours. In addition, DSV-OCT is able to measure the refractive index. Three IOLs with different dioptric powers (5D, 20D and 28D) were chosen to evaluate this method. The results show that this method is capable to provide a comprehensive and accurate evaluation of IOLs from the aspects of thickness, refractive index and dioptric power, and hence can be potentially used as a quality assurance tool by IOL manufacturers.

中文翻译：

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用双侧视光学相干断层扫描检查人工晶状体

人工晶状体（IOL）广泛用于白内障治疗。其光学特性对于获得良好的治疗效果至关重要，因此需要进行评估和控制。在这项研究中，我们提出了一种基于光学相干断层扫描 (OCT) 的新方法，用于非接触式和准确体外测量人工晶状体植入物的厚度、折射率和屈光度。OCT 设置专门设计用于创建两个采样光学器件，称为双侧视图 OCT (DSV-OCT)，它允许在单次 OCT 体积扫描中同时从两个相对侧对 IOL 进行成像。这可以产生三维表面轮廓，而不会因曲面的折射而导致图像失真。然后，可以从表面轮廓轻松计算厚度和表面曲率。此外，DSV-OCT 能够测量折射率。选择具有不同屈光度数的三种人工晶状体（5D、20D 和 28D）来评估该方法。结果表明，该方法能够从厚度、折射率、屈光度等方面对人工晶状体进行全面、准确的评价，