Nowadays, smart contact lenses (SCLs) display interesting features for healthcare monitoring; however, their comfort and practical usability strongly depend on the outermost material in contact with the eye. In this publication, the embedding of a custom‐made and thermoformed Near‐Field Communication based circuit in a conventional soft CL is presented. The circuit is composed of gold tracks on polyimide between thermoplastic polyurethane layers (insert), while the lens is based on industry standard double‐molding process of poly(2‐hydroxyethyl methacrylate) with proven compatibility with corneal tissue. The lens shows stable geometrical parameters (bevel landing area) thus enabling a practical implementation. Finite element method models are used to optimize the thermoforming process in order to provide a stable and desired curvature of the insert before the embedding process. While the insert is designed to allow oxygen transmission at the center of the lens, a custom‐made ultra‐compact radio‐frequency antenna provides communication and wireless power transfer both in air and inside saline solutions. The successful combination of the intrinsic soft mechanical properties of the wirelessly powered electronic insert with conventional hydrogel materials and manufacturing processes delivers a practical solution for SCLs. This enables non‐invasive applications in fields such as vision correction and/or biomedical sensing.

中文翻译：

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基于近场通信的基于水凝胶的智能隐形眼镜

如今，智能隐形眼镜（SCL）展示了用于医疗保健监控的有趣功能。但是，它们的舒适性和实用性在很大程度上取决于与眼睛接触的最外层材料。在本出版物中，介绍了在传统的软CL中嵌入基于定制和热成型的近场通信的电路。该电路由热塑性聚氨酯层（插入）之间的聚酰亚胺上的金迹线组成，而透镜则基于行业标准的聚甲基丙烯酸2-羟乙酯的双模工艺，并已证明与角膜组织相容。镜头显示出稳定的几何参数（斜面降落区），因此可以实际实施。有限元方法模型用于优化热成型过程，以便在嵌入过程之前提供稳定且理想的插入件曲率。尽管插入物的设计允许氧气在镜片中心传输，但定制的超紧凑型射频天线可在空气和内部盐溶液中提供通信和无线功率传输。无线供电电子插件的固有软机械性能与常规水凝胶材料和制造工艺的成功结合，为SCL提供了实用的解决方案。这可以在视力矫正和/或生物医学传感等领域实现非侵入性应用。定制的超紧凑型射频天线可在空气和内部盐溶液中提供通信和无线功率传输。无线供电电子插件的固有软机械性能与常规水凝胶材料和制造工艺的成功结合，为SCL提供了实用的解决方案。这可以在视力矫正和/或生物医学传感等领域实现非侵入性应用。定制的超紧凑型射频天线可在空气和内部盐溶液中提供通信和无线功率传输。无线供电电子插件的固有软机械性能与常规水凝胶材料和制造工艺的成功结合，为SCL提供了实用的解决方案。这可以在视力矫正和/或生物医学传感等领域实现非侵入性应用。