Functional Contact Lenses for Remote Health Monitoring in Developing Countries.
ABSTRACT The opportunities afforded by using a functional contact lens for remote wireless health status monitoring are discussed and the progress to date in the development of this technology platform is presented. A functional contact lens complete with sensors and embedded circuitry can be used to monitor the composition of tear fluid and, by extension, a number of health-status related parameters in the body in a noninvasive and continuous fashion. The data collected by the disposable contact lens may be sent wirelessly to a mobile phone that, in turn, can relay the information to a medical practitioner via the cellular phone network. If successfully developed and deployed, such a system can be used for monitoring a variety of health indicators over a large geographic area and population distribution with minimal need for the physical presence of health care providers.
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ABSTRACT: We present progress toward a wirelessly-powered active contact lens comprised of a transparent polymer substrate, loop antenna, power harvesting IC, and micro-LED. The fully integrated radio power harvesting and power management system was fabricated in a 0.13 μm CMOS process with a total die area of 0.2 mm<sup>2</sup>. It utilizes a small on-chip capacitor for energy storage to light up a micro-LED pixel. We have demonstrated wireless power transfer at 10 cm distance using the custom IC and on-lens antenna.IEEE Transactions on Biomedical Circuits and Systems 01/2011; · 2.74 Impact Factor