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Technology / Thu, 06 Jun 2024 CNBC

Scientists develop ultra-thin battery for smart contact lenses that could be charged by tears

Scientist Lee Seok Woo said a scene from a "Mission Impossible" movie inspired his latest invention: batteries for smart contact lenses. In the fourth film of the series, an agent wears contact lenses capable of facial recognition and eye tracking. "I was thinking, 'How can I work in this field of smart contact lenses?'" He realized smart contact lenses would need safe and compact batteries, which would be crucial for advancing development of these devices. Contact lenses themselves are extremely thin, at 0.5 mm, thus the size and flexibility of these batteries are key to preventing user discomfort.

Scientist Lee Seok Woo said a scene from a "Mission Impossible" movie inspired his latest invention: batteries for smart contact lenses.

In the fourth film of the series, an agent wears contact lenses capable of facial recognition and eye tracking. Lee wanted to make that lens a reality.

"I was thinking, 'How can I work in this field of smart contact lenses?'" the Nanyang Technological University's School of Electrical and Electronical Engineering associate professor told CNBC's "The Edge."

Lee's expertise in battery components served as the jumping off point for his foray into wearable technology. He realized smart contact lenses would need safe and compact batteries, which would be crucial for advancing development of these devices.

Contact lenses themselves are extremely thin, at 0.5 mm, thus the size and flexibility of these batteries are key to preventing user discomfort.

"The thickness of our battery is about 0.2 mm, which is about twice the thickness of a human hair," Lee said.

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