Researchers at the Nanyang Technological University (NTU) in Singapore have developed a groundbreaking battery that can power smart contact lenses and be charged with tears, according to a university press release. Contact lenses have come a long way in terms of technological advancements, with companies striving to create smarter versions that can connect to devices like smartphones and display information right in front of the wearer’s eyes. However, these applications require the lenses to have an internal battery.

In the past, Interesting Engineering has reported on how companies have successfully incorporated augmented reality displays into smart contact lenses. These devices typically use thin batteries with induction coils and wires made of metals, which can pose risks to the user’s eyes. To address this concern, a research team led by Assistant Professor Lee Seok Woo from NTU’s School of Electrical and Electronic Engineering (EEE) has developed a battery that eliminates the use of metals.

The micrometer-thin battery is powered by saline solution, making it safe and suitable for use in contact lenses. This innovative approach not only eliminates the risks associated with metal-based batteries but also provides a sustainable and convenient charging method. Tears naturally contain electrolytes, which can be used to generate electrical power for the lens battery.

Professor Lee Seok Woo and his team have successfully demonstrated the functionality of the lens battery, showcasing its potential to revolutionize the field of smart contact lenses. With this breakthrough, the development of safer and more efficient wearable technology is within reach.

This exciting research opens up new possibilities for the future of smart contact lenses, bringing us closer to a world where wearable devices seamlessly integrate with our daily lives. The NTU team’s work represents a significant step forward in the pursuit of safer and more advanced wearable technology.

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