Researchers at the Nanyang Technological University (NTU) in Singapore have developed an innovative micrometer-thin battery that can power smart contact lenses and be charged with tears, according to a university press release. Contact lenses have traditionally been used for vision correction, but with advancements in technology, companies have been striving to create smarter versions that can connect to devices like smartphones and display information directly to the wearer’s eyes. However, these applications require the lenses to have an internal battery.
In the past, Interesting Engineering has highlighted how companies have achieved augmented reality displays on smart contact lenses. These devices typically utilize 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 Lee Seok Woo, an assistant professor at NTU’s School of Electrical and Electronic Engineering (EEE), has developed a battery that eliminates the use of metals.
The NTU team’s battery is incredibly thin, measuring just a few micrometers in thickness. It is powered by saline solution, which allows it to be charged by tears. This breakthrough not only eliminates the need for potentially harmful metals but also provides a more comfortable and safe experience for contact lens wearers.
Professor Lee Seok Woo displayed the lens battery developed by his team, showcasing its potential to revolutionize the field of smart contact lenses. With this new technology, the possibilities for enhanced vision correction and augmented reality displays are expanding, while ensuring the utmost safety for users.
For more information on this exciting development, you can visit the original article on NTU Singapore’s website.