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Dual-Mode Contact Lens for Passive Electromagnetic Shielding and Active Electroretinogram Detection.

Shengxin Xiang1, Xiao Wei1, Xiaohua Chen1

  • 1Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China.

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|November 25, 2025
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Summary

Researchers developed dual-mode contact lenses (DMCLs) combining electromagnetic interference (EMI) shielding and electroretinogram (ERG) recording. These multifunctional smart contact lenses offer passive protection and active health monitoring for ocular applications.

Keywords:
Dual-modeElectromagnetic shieldingElectroretinogramSmart contact lenses

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Area of Science:

  • Ophthalmic medical devices
  • Nanomaterials science
  • Biomedical engineering

Background:

  • Smart contact lenses (SCLs) are evolving beyond vision correction to incorporate advanced functionalities.
  • Integrating passive functions like electromagnetic interference (EMI) shielding with active functions such as electroretinogram (ERG) monitoring in SCLs is an underexplored area.

Purpose of the Study:

  • To develop and characterize dual-mode contact lenses (DMCLs) capable of both EMI shielding and ERG recording.
  • To assess the biocompatibility and long-term stability of the developed DMCLs for ocular applications.

Main Methods:

  • Sequential spray-coating of silver nanowires (AgNWs) and MXene onto commercial contact lenses.
  • Characterization of EMI shielding effectiveness (SE) and material stability in contact lens care solution.
  • Evaluation of biocompatibility through in vivo rabbit wear tests.
  • Validation of ERG recording capabilities and signal fidelity in animal models.

Main Results:

  • DMCLs achieved an EMI shielding effectiveness (SE) greater than 20 dB.
  • The MXene layer stabilized the AgNW conductive network, maintaining performance after one month of immersion.
  • Biocompatible coatings allowed for safe 8-hour wear without ocular irritation.
  • In vivo rabbit studies successfully recorded six standard ERG waveforms with preserved signal fidelity for over a week.

Conclusions:

  • The developed DMCLs successfully integrate passive EMI shielding and active ERG monitoring into a single ocular device.
  • This dual-functionality establishes a new platform for advanced, SCL-driven healthcare solutions.
  • DMCLs represent a significant advancement in multifunctional smart contact lens technology.