Tear-Recharging Smart Contact Lenses

As wearable technology is rapidly advancing, scientists from Nanyang Technological University in Singapore have taken another step forward. Scientists there have made an innovation that could shape the future of smart contact lenses. Researchers have developed an ultra-thin battery that can be charged with tears, bringing smart contact lenses one step closer to becoming a reality.Lee Seok Woo, one of the names behind this innovation, says he was inspired by the popular movie “Mission Impossible”. In the fourth series of the movie, agents wore contact lenses that could perform facial recognition and eye tracking. Lee set out to make this dream a reality and eventually developed a battery that can be charged with tears.

Future Technology Smart Lenses

Unlike conventional lithium-ion batteries, this new battery works using a biocompatible saline solution. The battery is charged by immersing it in a saline solution with a glucose coating. Glucose reacts with sodium and chloride ions to charge the battery. After eight hours of chemical charging, the battery can reach 80% of its full capacity and can be used for several hours during the day. But the most remarkable feature of this battery is that it can be charged with tears. Lee explains that the tear solution contains glucose, which allows the battery to be charged even when the lens is worn.

This new technology has great potential, especially for diabetics. Patients who have to constantly check their glucose levels will be able to make instant glucose measurements thanks to these smart lenses. Lee and his team note that the thickness of the lens is 0.5 mm and the thickness of the battery is only 0.2 mm. In this way, the lenses can be worn comfortably without causing discomfort to the user.

Ultra-Thin Battery Rechargeable with Tears

Yun Jeonghun, another important name in the research, emphasizes that traditional metal electrodes can be harmful to the eye and that the battery they developed eliminates this problem. The battery works with a glucose oxidase coating and reacts with ions such as sodium and potassium in tears to produce current. This method is both safe and environmentally friendly.

This technology shows that smart contact lenses have the potential to revolutionize the healthcare industry. It could be used for diabetes patients, as well as other health monitoring and treatment devices. Lee notes that costs need to be kept low in the process of commercializing the batteries and that they can be produced at a cost of a few dollars.

Ultimately, these ultra-thin batteries, which can be charged with tears, ensure that smart contact lenses are not just a science fiction dream, but a tangible reality. This innovation has the potential to revolutionize the healthcare industry and wearable technology.