National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, China.
Department of Ophthalmology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210094, China.
Nat Commun. 2024 Apr 27;15(1):3588. doi: 10.1038/s41467-024-47851-y.
Eye tracking techniques enable high-efficient, natural, and effortless human-machine interaction by detecting users' eye movements and decoding their attention and intentions. Here, a miniature, imperceptible, and biocompatible smart contact lens is proposed for in situ eye tracking and wireless eye-machine interaction. Employing the frequency encoding strategy, the chip-free and battery-free lens successes in detecting eye movement and closure. Using a time-sequential eye tracking algorithm, the lens has a great angular accuracy of <0.5°, which is even less than the vision range of central fovea. Multiple eye-machine interaction applications, such as eye-drawing, Gluttonous Snake game, web interaction, pan-tilt-zoom camera control, and robot vehicle control, are demonstrated on the eye movement model and in vivo rabbit. Furthermore, comprehensive biocompatibility tests are implemented, demonstrating low cytotoxicity and low eye irritation. Thus, the contact lens is expected to enrich approaches of eye tracking techniques and promote the development of human-machine interaction technology.
眼动追踪技术通过检测用户的眼球运动并解码其注意力和意图，实现高效、自然和轻松的人机交互。在这里，我们提出了一种微型、不可见且生物兼容的智能隐形眼镜，用于现场眼动追踪和无线眼机交互。该隐形眼镜采用频率编码策略，无需芯片和电池即可成功检测眼球运动和闭合。使用时序眼动追踪算法，该隐形眼镜具有<0.5°的高角度精度，甚至小于中央凹的视觉范围。在眼动模型和活体兔子上演示了多种眼机交互应用，如眼动绘图、贪吃蛇游戏、网页交互、云台控制以及机器人车辆控制。此外，还进行了全面的生物相容性测试，结果表明该隐形眼镜具有低细胞毒性和低眼刺激性。因此，这种隐形眼镜有望丰富眼动追踪技术的方法，并促进人机交互技术的发展。
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