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Eye-surface conformable telemetric structure for polymer-based retinal prosthesis.

Joonsoo Jeong¹, Seung Woo Lee, Kyousik Min

¹School of Electrical Engineering and Computer Science, Seoul National University, Seoul, Korea. joonsoo.jeong@gmail.com

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|January 19, 2012

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Researchers developed an inductive telemetry system for retinal prostheses using Liquid Crystal Polymers. This conformable system enhances power and data transmission for polymer-based retinal implants, showing promise for in-vivo functionality.

Area of Science:

Biomedical Engineering
Materials Science
Ophthalmology

Background:

Retinal prostheses require efficient wireless power and data transmission.
Conformable materials are crucial for comfortable and effective retinal implants.
Liquid Crystal Polymers (LCPs) offer unique properties for biomedical applications.

Purpose of the Study:

To develop and optimize an inductive telemetry system for LCP-based retinal prostheses.
To investigate the performance of thermo-formed, convex coils for retinal implants.
To evaluate the in-vivo functionality and biological media effects on the telemetry system.

Main Methods:

Development of an inductive telemetry structure using Liquid Crystal Polymers.
Thermo-forming of a coil into a convex shape for conformal implantation.

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Finite Element Method (FEM) simulations for optimizing coil geometric parameters.

Electrical characterization and performance testing of fabricated coils.

In-vivo experiments to assess system functionality and biological impact.

Main Results:

Optimized geometric parameters for maximizing coupling coefficient and quality factor.
Demonstrated successful power and data transmission through the thermo-formed coil.
Compared electrical properties of deformed (convex) and planar coil structures.
Confirmed functionality of the telemetry system under in-vivo conditions.
Evaluated the influence of biological media on the telemetry link properties.

Conclusions:

The developed LCP-based inductive telemetry system is suitable for retinal prostheses.
Thermo-formed convex coils maintain performance for conformal implants.
The system demonstrates robust functionality in biological environments.