These days, it is done less often because contact lenses are very effective at covering these defects, and prosthetic technology is also more accessible.

现如今，因为隐形眼镜能更有效的掩饰那些缺陷便很少有人用了，并且这种修复技术也更容易被接受。

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With a thorough understanding of RFID and RF card technology, the author designed and developed a complete set of contact-less RF card toll system.

本课题在对射频卡相关理论和技术的深入了解的基础上，设计开发并逐步改进完善了一套完整的非接触式射频卡收费系统。

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